Shower water pressure surges on Sureflow pump

[John_Canfield]

Since we are usually 'plumbed' in to water at campsites, this isn't a huge problem, but an annoyance when running on tank water.

The water pressure surges quite a bit in the shower in sync with the pump changing speeds. Water pressure out of the other faucets is a normal constant stream. I took out the flow restrictor in the shower wand (like I always do on any of my plumbing fixtures), but that shouldn't have anything to do with the issue.

Ideas anyone?

[John_Canfield]

Since we are usually 'plumbed' in to water at campsites, this isn't a huge problem, but an annoyance when running on tank water.

The water pressure surges quite a bit in the shower in sync with the pump changing speeds. Water pressure out of the other faucets is a normal constant stream. I took out the flow restrictor in the shower wand (like I always do on any of my plumbing fixtures), but that shouldn't have anything to do with the issue.

Ideas anyone?

[Rick Buddrus]

Blockage in the strainer

Sucking air on the intake side

Pump defective

Is the accumulator still in the circuit John?

[ichn2go]

John, you know I am not as astute or mechanically inclined as other members.
But , it seems to me that if you have a constant flow of water, then the pump should maintain that flow and not speed up or slow down. The accumulator that Rick mentioned could need air. Yet I don't quite understand the surging when the flow is constant. Try replacing the restrictor and see what happens.. Good Luck Jim

[John_Canfield]

Jim and Rick,

I have the 5.7 Shurflow with the electronic sensor which doesn't use an accumulator tank (which was a surprise to me.)

The shower flow would slow to heavy dribble,then speed up to normal, then repeat. With an open faucet, the pump should run all of the time. I also noticed that if you cut the flow way back on a faucet, it will also 'pulse.' I'm pretty sure the strainer is clean, but that is something to check. Perhaps the obvious is a bad pump; I might give Shurflow a call. Thanks guys.

[Rick Buddrus]

John,

When I installed the 5.7 in my 03, I left the accumulator in the circuit. Always wondered if Winni was going to deliver the newer coaches with it or without it. Considering the symptoms you described, I am strongly thinking the pump is at fault. Giving the folks at Shurflow at shot at it is the best path me thinks. How's that Datastorm doing?

[Tom N]

I have the 5.7 in my coach and it works great. No pressure problems. Enough pressure to work the messuage feature on the shower head.

You must have a restriction somewhere. Have you checked the Shurflo filter located on the pump?? There is also the remote possiblity that there is something in your fresh water tank blocking the outlet. I have heard of some of the plug cutouts being left in the tank.

[Tom N]

The 5.7 does not use an accumulator tank.

The 5.7 is variable speed and the little micro-processor computer determines the speed by the flow requirements.

The 5.7 is capable of 5.5 gallons per minute and a pressure up to 65 PSI.

They may be a problem with your pump. Shurflo will graciously replace it.

[Rapid Ray]

If your shower head has a adjustable setting, from soft to pulsating, turn the adjustment off soft until a steady stream is provided. Seems the "restriction" has been found in the shower head because it doesn't demand (allow) full pump output.

[Tom N]

Take the tank out. It will confuse the micro-processor on the 5.7.

Winnebago does not use a tank with the 5.7 and Shurflo recommends that none is needed.

[Joe-K]

You've got good advice. Remove the accumulator tank with the variable speed pumps. They are designed to vary their speed rather then cycle on and off with flow demands. The accumulator tank is used with a cycling pump to steady the flow.

When I installed my variable speed pump, I simply let the air out of the accumulator tank. Letting the air out was easier than removing the tank, and solved the surging problem you described. Letting the air out is also reversible.

[Rick Buddrus]

Sorry Tom but the accumulator tank is not confusing my 5.7 and it has been in there a year now. Winni isn't using one on the new coaches because the 5.7 does not require it and it would be a waste of money on their part to put one in. It was just easier for me to leavce mine in the circuit and it seems to be cohabitating with the 5.7 fairly well.

[kenbt]

John:
On my 2005 Vectra I found that I had two water restrictors on the shower. One was just before or after the manual shut off near the area the hose to the shower head attaches to the wall. The second one was in the shower head itself. Make sure you don't have two also. That was my problem with low and surging volume fromt he shower.

[John_Canfield]

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by kenbt:
John:
On my 2005 Vectra I found that I had two water restrictors on the shower. One was just before or after the manual shut off near the area the hose to the shower head attaches to the wall. The second one was in the shower head itself. Make sure you don't have two also. That was my problem with low and surging volume fromt he shower. </div></BLOCKQUOTE>Oh, how about that! BINGO! I removed the check valve Winnie installed with the shower shut-off valve and we have pressure and no surging I am having a long, vigerous and hot shower tonight.

Thanks!