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Sprayer Depot Blog

Troubleshooting the Hypro D30 Diaphragm Pump: An Update on a Popular Topic

Posted by Sprayer Depot on Fri, Jun 30, 2017

We receive many calls and emails from customers requesting help troubleshooting the Hypro D30 diaphragm pump.  In this post, we've updated some information previously published on this topic to highlight some easy-to-identify solutions.

One of the top-selling pumps at Sprayer Depot, the Hypro D30 offers low cost maintenance and almost wear-free operation which helps make it the ideal choice for a wide variety of spraying jobs. Recommended for spraying herbicides, pesticides, liquid fertilizers, and many other hard-to-handle fluids, the Hypro D30 is not only one of our top-selling pumps, but also the preferred choice for several of our small to medium-sized Kings Sprayers® models.

Properly maintaining your pump will not only increase your application efficiency but also add years of life to your equipment. Follow these easy tips to service your diaphragm pump:

1. After usage, flush the pump with clean water.

2. Hypro recommends changing oil after 40 hours of break-in operation and every three months or 500 hours, whichever comes first. Use Hypro pump oil , which is a specially formulated, high-grade, non- detergent, SAE 30 weight oil.

3. For freezing conditions, flush the pump with a 50/50 mixture of water and antifreeze.

4. Change diaphragms every 500 hours or three months, whichever comes first.

 For easy troubleshooting of your Hypro D30 diaphragm pump, check out this helpful infographic:


Download High-Resolution Infographic

If you are still having trouble identifying a problem with your pump jus We will be happy to help and have you back up and running in no time!

Shop Hypro Diaphragm Pumps

Topics: Hypro, diaphragm pump, Hypro D30 Pump, infographics

Tuesday Spray Tips Video Recap

Posted by Sprayer Depot on Fri, May 27, 2016

Sprayer Depot recently introduced a new video series called “Tuesday Spray Tips”, specifically TuesdaySpraytips_Recap-1-943945-edited.jpgdesigned to share spray equipment information in 30 seconds or less, twice a month. We are so excited about the response to the new videos, we are tipping our hats off to each and every one of our customers who has watched, shared, liked and commented on the videos. Thanks for your support! 

Just in case you’ve missed them, we will share a brief recap every month where you’ll have the opportunity to get caught up and watch the videos. (Or just watch them all over again!)

Let’s take a look at May’s Tuesday Spray Tips videos:

We started off with a short video showcasing one of our recent custom-built sprayers. The Kings Sprayers 200 Gallon Hot Water Pressure Washer Sprayer features a hot water heater making it great for sanitizing and debris removal. It can be used in truck beds, utility vehicles, boats, and trailers. There is no clean up job too difficult for this sprayer! Check it out:

Our next Tuesday Spray Tips video features an inside look at the Hypro Diaphragm Pump D403. This is a very popular pump recommended for spraying herbicides, pesticides, liquid fertilizers and many other hard-to-handle fluids. We also shared 3 maintenance tips to keep your pump in tip-top condition:

Sprayer Depot is a one-stop shop for all your spray equipment needs, which is why we are showcasing our repair and service department in this next video. We take care of your orders and also any maintenance or repairs needed on your equipment. Learn more about getting your repair done through us by watching this video:

The last Tuesday Spray Tip of the month goes over our money-saving deals. We tell you how to snag a big discount on your spray equipment. Want to know how? Watch the video below!

Do you have a suggestion you'd like to see featured as part of our Tuesday Spray Tips? Leave us a comment in the section below. You can also catch more informative videos by visiting our YouTube Channel.

Visit Sprayer Depot's YouTube Channel

Topics: Spray Equipment Maintenance, Sprayer Depot, diaphragm pump, spray tips, hot pressure washer sprayer, clearance, Tuesday Spray Tips

Introducing Tuesday Spray Tips Video Series

Posted by Sprayer Depot on Wed, Apr 27, 2016

We previously asked you to cast a vote on new instructional video topics for our YouTube Channel. We wanted to know more about the topics that interest you the most, and what types of videos you want to see on our social media channels. We appreciate the feedback and love when customers tell us exactly what they want. The votes are in, and it looks like we have a winner: Repair Videos! 

Here’s a quick breakdown of the results:


We already offer a wide selection of repair videos on our website and YouTube channel, and are happy to learn you crave even more of this type of content! We are in the process of designing comprehensive instructional videos that will teach you how to repair and operate some of the most commonly used spray equipment in the industry such as diaphragm pumps, spray guns and strainers, just to mention a few.

So, what about the rest of the topics? Well, we have put your votes to good use! We want to give you even more content in a fun and easy-to-digest format. So, we are excited to introduce “Tuesday Spray Tips”, a video series where we share information in 30 seconds or less, twice per month. You can expect bite-size content covering topics from spray tips and tricks, to highlighting our Kings Sprayers®  line of commercial sprayers in these videos. Do you have a particular question about your pump? Or maybe you are just looking for tips on servicing your sprayer?  Let us know in the comment section below and we might feature your questions in our videos!

So far, we've showcased a very popular custom Kings Sprayers® Hot Water Pressure Washer sprayer and shared some tips on cleaning a Hypro D403 diaphragm pump.

Check out our current videos on our YouTube Channel and don't forget to subscribe.


Topics: Sprayer Depot, diaphragm pump, Instructional Video, Hypro Pump, Youtube

5 Steps to Mount Hypro VDR50 Control Unit on a Diaphragm Pump

Posted by Sprayer Depot on Mon, Apr 25, 2016

A control unit can help you achieve a more precise application by maintaining a consistent pressure in the discharge line while you spray. This allows excess liquid flow to by-pass back to a tank or drain. Using a control unit will ensure that flow is cut off at a certain pressure to ensure a safe and accurate application.

Save money in chemical costs and time by installing a control unit on to your pump. Let’s take a look at one of our most popular control units:

Hypro_VDR50-ControlUnit.pngThis control unit can handle flow rates up to 35 gpm (132.5 lpm) and pressures up to 725 psi (50 bar). It can be mounted directly onto the following pump models:

Pump Name Model Number
Hypro D503 Diaphragm Pump 9910-D503
Hypro D813 Diaphragm Pump 9910-D813
Hypro D1064 Diaphragm Pump 9910-D1064
Hypro D1265 Diaphragm Pump 9910-D1265

We have all these pump models in stock and ready to ship! Browse our large inventory of diaphragm pumps on our website. 

You can mount this control unit using two methods: Direct Mounting and Remote Mounting. Today we'll cover how to install Hypro's VDR50 using the Direct Mounting method in 5 easy steps. For instructions on Remote Mounting, please refer to Hypro's website.

Direct Mount Installation

1. First, you'll need to locate the pump discharge manifold.

2. Lubricate o-rings and plug into the discharge manifold of the pump.

3. Lock into place using the retainer clip.

4. Connect the bypass hose to the bypass port hose barb elbow. Run it unrestricted back to the supply tank.

5. Connect the desired number of high-pressure outlet hoses to the outlet hose barbs.

Please note that the unused hose barb can be shut off with the ball valves provided.

If you are trying to decide whether a relief valve might be a better choice for you, we tackled the differences between control units and relief valves on our previous guest blog post, 5 Ways a Control Unit is Better Than a Relief Valve.

Currently own a different pump not compatible with the Hypro VDR50 control unit? Don't worry, we sell a variety of control units/pressure regulators to fit your spray equipment. 

Shop Control Units by Brand Click Here!


Topics: Hypro, Sprayer Depot, diaphragm pump, control unit, pressure regulator, VDR50

Read This Before You Buy a Sprayer Pump...

Posted by Sprayer Depot on Thu, Feb 04, 2016

There is more that goes into buying a pump for your sprayer than you may think. Whether it's a Pumps_SprayerDepot.jpgcentrifugal, diaphragm, roller, or piston pump, the right type of pump for you is definitely out there. It's easy to get overwhelmed by the many options available today but selecting the best pump doesn't have to be hard or time-consuming.

Our Customer Service Technicians handle many calls dealing with this very topic, so we asked them "What should customers consider when purchasing a pump?" and here's what they told us:

Flow Rate: This is measured in gallons per minute (gpm) and you'll want to determine your required flow rate before you shop. All pumps have a maximum gpm flow rate so you'll want to ensure the one you choose meets that number. A good tip to remember is: a higher flow rate means a larger pump size is needed.

Fluid Type: Are you spraying a clean fluid or an abrasive chemical? Is it low or high viscosity? These are just some of the aspects you'll need to consider when choosing a pump. The type of fluid being sprayed matters as there are specific pumps that will work best for your application, and some that just wont do the job.

Flow Pressure: Use this simple formula to calculate your required pressure:

 Desired Pressure at Nozzle (psi)
+ Hose Pressure Loss (psi)
Total Pump Pressure Needed (psi)

Once you've determined your requirements, you will have a better understanding about the type of pump you need. However, the search doesn't end there! Our Customer Service Technicians also recommend you ask these 8 questions before you purchase a pump:

1. What pump should I use to spray (insert chemical here)?
2. How far will this pump spray vertically?  
3. What other components do I need in order to use this pump on my sprayer?
4. What gas engine is compatible with my pump?
5. Which spray gun should I use?
6. How often should I replace common wear parts?
7. Which spray tip puts out the GPA I require?
8. What is the warranty on this pump?
A good spray equipment dealer should be able to answer all these questions to help you find the perfect match. A few other questions to ask to make sure you are getting the best pump and the best service are:
1. What are some of the most common issues with this specific pump?
2. How much maintenance does this pump require?
3. Besides the warranty, do you offer a repair service for this pump?
Our knowledgeable Customer Service Technicians have more than 30 years of combined experience in the spraying industry, so we can confidently help you make the right selection. We also offer a full service and repair department so we have expert Repair Technicians that can tell you what kind of performance you can expect from the pump and what to do if a problem arises.
Give us a call today and we'll make finding the right pump an easy process!

Topics: Maintenance, spray equipment, diaphragm pump, Pump, sprayer tips and tricks

Spray Equipment Maintenance Tips to Implement This Fall

Posted by Sprayer Depot on Wed, Oct 14, 2015

maintenanceHow diligent are you when it comes to servicing your spray equipment? If you are guilty of waiting until your equipment fails in order to repair and replace parts and accessories, don’t worry, we have all been there once or twice. However, with fall season already started and winter just around the corner, we want to remind you of the importance of timely maintenance of your spray equipment. Low spraying season is the perfect time to perform preventive maintenance and establish a maintenance schedule for the rest of the year.

Waiting for problems to arise will not only cost you time but will also cost you a lot of money. It pays off to be proactive, so don’t delay... keep your sprayer in tip-top shape!

Here are a few things you should check off of your maintenance list this fall:

1) Change the oil in your pump, gearbox and engine. Consult your manufacturer’s recommendations on appropriate fluid changes.

2) Check spray tips for wear and replace as necessary.

3) Flush the pump and tank with clean water and make sure to dry them using a clean rag.

4) Clean the strainer by removing any debris and flushing it with water to avoid contamination and loss of pressure. If the filter in the strainer is beyond cleaning make sure to replace it.

5) Don't forget to calibrate your sprayer before storing it. Follow the steps outlined here for more information on how to perform a calibration.

You should also create a maintenance program you can use to keep track of each maintenance task. To help you get started, we have created a Sprayer Seasonal Maintenance Checklist that lists all components that need to be serviced daily, weekly, quarterly and semi-annually. It also includes a winterizing checklist! Get it now by clicking below:

 Download the Sprayer Seasonal Maintenance Checklist

Have more questions regarding sprayer maintenance? Check out our Sprayer Maintenance FAQ's for more information. You can also give us a call and one of our Customer Service Technician will be happy to help!


Topics: Spray Equipment Maintenance, Maintenance, diaphragm pump, spray equipment checklist, Kings Sprayers, sprayer, spot sprayers, fall tips

3 Reasons Why You Need an Economy Sprayer

Posted by Sprayer Depot on Fri, Oct 02, 2015


The K15E100 is a 15 gallon economy sprayer ideal for garden and backyard use. You can use it to spray along fences, to keep weeds under control and to spray other hard to reach places. This type of sprayer comes in handy if you want something easy to transport but with enough power to get the job done quickly ad efficiently!

If you are currently using a backpack or a hand-held sprayer, or if you are just looking for a small, reliable unit, then keep on reading for our top 3 reasons why you should consider an economy sprayer.

1. Reduce Spraying Time

The 15 gallon tank on our economy sprayer holds 3-4 times more liquid than standard hand-held or backpack sprayers. This eliminates the need to constantly stop and refill your sprayer. This alone will save you so much time and will allow you to cover more space faster and more efficiently. One of our customers said "I was able to spray the territory in half the time!", when comparing his new 15-gallon economy sprayer to his old backpack sprayer.

2. Comfort and Safety

We all know that backpack sprayers can be really hard on your back, and using a hand-held sprayer is not much better either. Avoid unnecessary injuries and overexertion by just mounting this economy sprayer to an ATV or to another work vehicle.

3. Constant Pressure

Save yourself the hassle of having to manually pump a sprayer.The  Kings Sprayers Economy Sprayer is built with a standard Everflo 12 volt self-priming pump*. This will keep the pressure constant without having to rely on doing it yourself. Another one of our customers shared why he loves this unit "For about $40 more than my old backpack sprayer, this new sprayer helps me keep the flow rate at a constant level, making my application uniform"

Want to learn more? Check out these great features:

  • 15' of 3/8" Clear PVC Reinforced Spray Hose
  • 3/4" Tank Drain Large
  • 5" Fill Well with Vented Lid
  • 18" Spray Wand Adjustable Spray Nozzle
  • Durable Polyethylene Tank
  • 12 Volt Self Priming Diaphragm Pump (1 GPM, 40 PSI)

*12 volt pumps need to be powered by a 12 volt battery or wired up to an ATV/Truck

Watch the short video below to see this sprayer in action!


Topics: diaphragm pump, Kings Sprayers, sprayer, spot sprayers, Kings Spot Sprayers, weed control, economy, budget-friendly, everflo pumps

Kings Sprayers: Building a Sprayer

Posted by Sprayer Depot on Fri, Sep 25, 2015


Building sprayers is more than a job, it's a passion. Passion for ensuring customers' satisfaction, for finding set-ups that improve efficiency and ease of application, and most of all, a passion to build quality products that are cost-effective and time-saving. We are passionate about what we do and we are proud to manufacture Kings Sprayers in Orlando, FL. 

Do you want to learn more about how we build  Kings Sprayers? We thought you would so we've outlined the basic steps from start to finish.

The first step after we've received your order is for our production manager to go over the work order for your specific sprayer model. If it is a custom sprayer, he makes sure that it can be built according to your specifications while also following safety standards. If our production team identifies something that could be improved or changed to give you a product that may better meet your needs, our team will offer the solution and work with you to design the best set-up for your needs.  We love it when customers take an active role in customizing their sprayers. After all, no one knows your job better than you do! 

Then we move to the manufacturing process, where our welders will build a sturdy, yet lightweight, aluminum frame that will support all components in your sprayer. The next step involves assembly and this is where everything comes together. Our assembly technicians will carefully install all the individual components (hose reels, pumps, boomless nozzles, tanks, engines etc.) and make sure that every part is set up correctly. The unit then moves to our quality control station where it will be thoroughly tested.

Building Kings Sprayers at our Orlando facility instead of just outsourcing manufacturing means that we have control over quality, can offer better customization along with great prices and faster delivery times. We stand behind our products and can guarantee that our sprayers are built to the highest standards of quality and with the best available parts.

Have any questions or comments? Share them below!

Topics: 4-Wheel Sprayer, Custom-built Skid Sprayer, Hose Reel, Hose Reels, diaphragm pump, Roller Pump, Skid Sprayers, Boomless Nozzle, Pump, spray gun, poly tanks, 6061 Aluminum Frame, honda engine, 3-point-hitch

Product Highlight: Kings Sprayers 510 Gallon Highway Ready Trailer Sprayer

Posted by Sprayer Depot on Wed, Sep 23, 2015

In this Product Highlight post, we are featuring the Kings Sprayers 510 Gallon Highway-Ready Trailer Sprayer #KT510P12042EThis heavy duty, commercial sprayer is built strong for those big jobs where transportation is crucial. This specific model was designed after a customer contacted us needing a large capacity sprayer that could safely bed hauled from one location to another.

In order to ensure proper support and high durability, we mounted the tank on a steel tandem axle trailer. The tandem axle is ideal when transporting heavy loads and provides a more stable ride at higher speeds in highway conditions. The 510 gallon poly tank features molded-in legs to support the tank and band locators for tie down to make sure it stays in place. The straps are bolted to the frame to maximize safety and stability. To facilitate the operator's handling, the walls of the tank are translucent for easy level viewing and is equipped with gallon indicators. Best of all, we built it right here in our warehouse from the ground up, so we can account for its high-quality craftsmanship and parts.

This sprayer is great for spraying trees up to 80' in the air and the high flow pump is great for drenching and transferring liquids quickly. All of Kings Sprayers are customizable to your requirements, including this one! Call us and get it customized your way. 


  • 510 Gallon Free Standing Horizontal Leg Tank
  • 20 HP GX630 Electric Start Honda Engine
  • Udor KAPPA-120/GR Diaphragm Pump (35 gpm, 700 psi)
  • Electric Hose Reel with 300' of 3/4" ID Spray Hose
  • DOT Approved Tandem Axle Steel Frame with VIN 






Topics: Kappa, DOT, Customer, diaphragm pump, Kings Sprayers, sprayer, Electric Hose Reel, poly tanks, custom sprayer, dot approved, tandem axle, Steel Frame, customizable

Product Highlight: Kings Sprayers 35 Gallon Skid Sprayer

Posted by Sprayer Depot on Fri, Aug 07, 2015

In this Product Highlight post, we are featuring the Kings Sprayers 35 Gallon Skid Sprayer, model # K35P150A. skid35galsprayerThis is a great sprayer for garden and backyard use and it makes the perfect choice for commercial weed control treatments as it's efficient and easy to use! The 6061 aircraft grade aluminum frame is corrosion resistant and lightweight for easy handling. It can be bolted or strapped to a trailer, utility vehicle or tractor for field use. 

It comes with a 35 gallon capacity, premium-grade polyethylene tank, 30' clear braid hose, adjustable spray tip and a 12V SHURflo pump. The 12 volt pump can be attached to a separate 12 volt battery or to a vehicle's power supply. 

This sprayer is part of our Quickship™ Program, so order it by 12:00 p.m. EST and it will ship that same day!

Now, let's move on to getting familiarized with this awesome Kings Sprayer:

Safety First

  1. Ensure all unnecessary personnel is clear of the area.
  2. Use clean water instead of chemicals during initial testing to confirm the system and plumbing components are leak free.
  3. Ensure there is fluid in the tank and supply line.
  4. Check line strainer for debris or clogs and remove if any found.
  5. Check all plumbing connections to ensure tightness.
  6. Ensure all valves and regulators are set to the desired setting and working properly.
  7. Check all hoses are positioned properly and undamaged.

Starting Your Sprayer

  1. Plug the pump into a 12V power source. (Note: The pump will only run when the spray gun is in use).
  2. Adjust the spray gun by rotating the gray nozzle at the end. It is fully adjustable from a jet to a cone, to a full mist.
  3. Lock the spray handle by flipping the white switch.
  4. To turn on the agitator, flip the black switch. (Note: The pressure will drop when the agitator is engaged)

Shutting Down Your Sprayer

  1. Disconnect the pump from the power source.
  2. If the pump will not be used for several hours, flush your system to prolong the life of the components.
Watch our instructional video below for a quick recap on how to get started with this sprayer:



Topics: diaphragm pump, Kings Sprayers, sprayer, Quickship Sprayers, Kings Spot Sprayers, SHURflo pumps, weed control, k35p150a, spot sprayer, 35 gallons

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