Ryobi 900W Constant Pressure Pump RCPP900-D Questions & Answers

I have the virtually same setup as you and was about to buy that pump until i read this. So i asked Ryobi what the cut-in and cut out pressure settings are because nowhere in Spec or on box or pump is that vital info. Ryobi Aus contacted the factory in China who said about 22psi Cut-in and 60 psi cut-out. I emailed back saying this is unlikely to be right. Usually pumps have a 20psi difference between cutin and cutout. Eg they are 40-60,or 30-50psi etc. So a low 22psi for cut-in would cause low water pressure and flow consistency issues. They again checked and china confirmed about 22 cut in. If anyone has this ryobi model and is able to test the cutin and cutoff psi pressures could you please post it here.

Mine is doing the same now. I ended up getting another one and it does the same. Seems like a lot of people have that problem. I fixed it for a while and went to the old fashioned nozzle that lets a lot of flow of water but that did the same after a while.

Easy to get your money back at Bunnings. I just talked a mate into the bit cheaper Ozito pump. It is going all right but he has not had it long.

WOULD BE GOOD FOR RYOBI TO COMMENT ON THIS PROBLEM.

Have you sorted yours out?

Just interested have you fixed the problem. If no leaks it is time to get it replaced under warranty. If it still does it I'd say the problem is with your system. There is an air bleeder on the side. I guess you opened that a bit.? Also register online with Ryobi and you get extra warranty.

Did you ever sort out the problem? Just interested as I'll probably have to adjust mine soon..

I'd hope someone else would answer but not too many people around here. I do not like saying this but looks like you need to replace it. You can try different settings on the LED screen but that did not help my different problem.

Mine goes for 10 seconds and then stops for a half a second. The water flow drops a bit but does not stop. That is caused by the outlet pipe/hose/tap etc being too restrictive. I went to a better old style flowing nozzle on the hose and all was good.

If not hard to do just have the big outlet hose connected and see if it is different. And also I guess the inlet needs not to be too small from the tank. Do you have the full size hose hose and connections from the tank to the pump?

The strainer part needs to be sitting right but if you have not taken it out it still should be good.

If all fails just return it and get a receipt. If you register the pump on the Ryobi site you get 4 years warranty.

Hope all comes good.

OK thanks Firepower, the hose from the tank is a 19mm id. but the hose from the pump to the tap is just a normal size garden hose size, so I will replace that hose with a bigger one and see how that goes, Cheers

How did you go? Did you fix the problem?

Hey mate, no it didn't but I put it down to the fact that this only happens when I use it for watering my vegie patch with small little nozzles that put out a fine spray and I'm guessing the pump thinks it is a leak somewhere, because if I just use a normal hose this doesn't happen, so I just put up with it, but one thing good that came from the bigger pipe is it gave more water flow. Cheers mate.

Hope someone else can help but I found quite a few places where air is getting into your intake line like the following comment. I guess the pump strainer is sitting in right and not blocked. "Air leaks into the system Because air is leaking somewhere into the pump, it is unable to build up full pressure, and therefore cannot reach its deactivation pressure level. Result: the booster pump runs nonstop. Solution: check all the hoses / pipes for holes, and seal them."

I was hoping someone else would answer you but guess not too many hear to answer. Ryobi are very good at answering but may take a couple of days. The email contacts are at the bottom of this page. external link 

How long is your pipe from the pump to the tap and I suppose about the diameter of the normal house copper pipe? So you are saying if you turn the tap off the pump never stops.

I forget all about the adjustment of the pump on the screen as it has been a while since I got mine and do not want to touch it, as it is going great. I have mine going into a tap about 4 metres from the pump then into a garden hose going under the ground down the side of the house to the front of the house. This goes to another tap on the wall and then to a large garden hose reel.

Mine pump keeps running for about 9 seconds after I turn off the water at the hose nozzle.

All the best with it.

I had the same issue. Actually pump was working initially and out of a sudden it turned off while using it a day after installation. After restarting it the pressure switch did no longer work - so it did its 3 "dry run" cycles till it went on error again. There is one thing you have to check and that is that this filter cap is tight on as it pushes the valve at the bottom in place - odd design. The valve prevents the back flow and holds the pressure. Anyway - this did not turn out to be the issue but after one day when we just turned the power off and on to get water, it just started working again. I must say that I do not trust this pump and think it is not good for household water supply.

When I turn off at the hose nozzle it keeps running for 9 seconds. If you have a longer hose/pipe from the pump to the tap it would run longer before switching off. I had the opposite problem until I realised what it was. I have a Holman wifi tap timer and using that with the fancy trigger hose nozzles it restricted the water too much and when the hose was on the pump would go off and on every 8 seconds which is not too good for the pump. So I have bought a old type when you turn the front of the nozzle on it to adjust the flow. It is a blue and white Nylex nozzle and also has a on/off trigger. This works good. Another problem I had there was rubbish in the Holman timer filter between the tap and Holman timer. Once I cleaned that it was good. So is your pipe from the pump to the pump to the tap really long and it takes quite a while to build up pressure and turn the pump off. You can adjust the pump with the buttons and lcd screen but I suppose you have done that, Holman Customer Service is really good so you could message them. All the best with it.

That just means that you can water your garden quicker. Not many complain about that. :) In my photos above I have the pump going into taps so for less water I could just turn the tap off a bit. Also the Holman wifi tap timers are great as they are designed that they are always on a timer and I now do not waste water. You need good wifi for them to work good but they also sell a Bluetooth one that works from a mobile phone. They also restrict the flow a bit.

So I am not sure what you have. Maybe your hose goes straight onto the pump. From a quick look at the manual it appears you can adjust the flow rate and there is a timer. When I first bought the pump I checked out the buttons and LCD screen but it seemed to be confusing even with the instructions.

With adjusting the flow rate on the LCD screen it still may not be low enough pressure for you. You could put an inline water valve to reduce the pressure. Maybe you could have maybe a metre of hose from the pump and put in a inline water valve which are cheap. You'll need a few fittings to put it in the hose. If you restrict the water too much the pump will stop and start all the time and that is not what you want to happen.

Also is there a simple solution with an adjustable nozzle. There are lots of water adjustable nozzles from the old fashioned screw ones to the gun types. Some gun types you can set the level of spray. Maybe this suits you and all I needed to mention.

But remember do not restrict the water too much as it will cause the pump to stop and start all the time which would not be good for the pump. But as far as I can see it is a great pump and much cheaper than ones from Irrigation Shops.