water pump replacement

If it cycles on and off WHILE THE FAUCET IS OPEN then the pump is capable of providing a larger volume of water than the faucet can consume. So the pressure builds until the cutoff point, the pump shuts off, the pressure drops because the faucet is running and the pump turns back on. The simplest way to solve this is with an accumulator.

lamoz1 wrote:
Ok,
I've installed a new pump. Runs quieter but the vibration of the hard
pipe is what caused the noise. Now I have another issue, once the pump is
running and I use water it pulsate. In other words it runs, stops for a second
and the runs again and continues like that. On and off constantly

I wish could add a photo also, since the plumbing seen weird to me
because the intake hose goes into the pump but a second line with a valve. The out line on the pump the attaches to this same line with the valve and then to the coach. Not sure what the purpose of this valve is.
and when it should be on or off.

I think the pulsation you are describing is air in the system, once you bleed all the air out that might stop.

Ok,
I've installed a new pump. Runs quieter but the vibration of the hard
pipe is what caused the noise. Now I have another issue, once the pump is
running and I use water it pulsate. In other words it runs, stops for a second
and the runs again and continues like that. On and off constantly

I wish could add a photo also, since the plumbing seen weird to me
because the intake hose goes into the pump but a second line with a valve. The out line on the pump the attaches to this same line with the valve and then to the coach. Not sure what the purpose of this valve is.
and when it should be on or off.

camperdave wrote:

TechWriter wrote:

lamoz1 wrote:
I have a Shurflo 2088 403 144 water pump
that is now leaking. It's also pretty noisy.

Consider replacing with a Remco 55 AquaJet ARV.

Note: If you have an accumulator tank you will just need to remove it, this pump will not run correctly with an accumulator tank. The Aquajet pumps need a hard shut off, an accumulator tank creates a soft shut off.

^^ interesting note from that link. Wouldn't the air pocket in the water heater create a similar soft shut off?

No, it's not the same. That space is not compressible (no bladder like an accumulator) and would provide the same hard cut-out.

TechWriter wrote:

lamoz1 wrote:
I have a Shurflo 2088 403 144 water pump
that is now leaking. It's also pretty noisy.

Consider replacing with a Remco 55 AquaJet ARV.

Note: If you have an accumulator tank you will just need to remove it, this pump will not run correctly with an accumulator tank. The Aquajet pumps need a hard shut off, an accumulator tank creates a soft shut off.

^^ interesting note from that link. Wouldn't the air pocket in the water heater create a similar soft shut off?

lamoz1 wrote:
I have a Shurflo 2088 403 144 water pump
that is now leaking. It's also pretty noisy.

Consider replacing with a Remco 55 AquaJet ARV.

Fulltimers wrote:

lamoz1 wrote:
Ok, this thread has been hi-jacked lol.

Sorry for the Hi-Jack…
Last post,
This afternoon I went down to the motorhome with allen wrench in hand. To my surprise when I turned on the pump there was no noise. I turned on the kitchen faucet and got water, a second or two later the pump kicked on, then a second or two after turning off the faucet the pump shut off. Several attempts later I could not get it to fail. The water flow wasn’t as I was hoping for so I checked how much water I got out of the kitchen faucet in 1 minute. Pump is supposed to deliver 3.0 gpm. I got less than 1.5 gpm. I figured the faucet has a restrictor in it so I am not too concerned.

Now back to the original post…
Other than the hiccup in the beginning I am happy that I purchased this 8004-101-e65 Shurflo rather than repair the old (obsolete) pump. Oh and it is a bit quieter than the old.

With your comment on the water pressure, does every faucet have low pressure?
Just wondering if there are others like mine and with my pump delivering more pressure than shore water?

lamoz1 wrote:
Ok, this thread has been hi-jacked lol.

Sorry for the Hi-Jack…
Last post,
This afternoon I went down to the motorhome with allen wrench in hand. To my surprise when I turned on the pump there was no noise. I turned on the kitchen faucet and got water, a second or two later the pump kicked on, then a second or two after turning off the faucet the pump shut off. Several attempts later I could not get it to fail. The water flow wasn’t as I was hoping for so I checked how much water I got out of the kitchen faucet in 1 minute. Pump is supposed to deliver 3.0 gpm. I got less than 1.5 gpm. I figured the faucet has a restrictor in it so I am not too concerned.

Now back to the original post…
Other than the hiccup in the beginning I am happy that I purchased this 8004-101-e65 Shurflo rather than repair the old (obsolete) pump. Oh and it is a bit quieter than the old.

Ok, this thread has been hi-jacked lol.

rgatijnet1 wrote:


It sounds like you have you input water lever on shore water which will not allow the pump to build up pressure and shut off.

I did not have the motorhome hooked to shore water. I believe the valve was turned to input water. There is a check valve on the water inlet to hole pressure. If this is where I was loosing pressure I would see water coming out the inlet, which I didn't.

Before blindly making any adjustments to the pressure or bypass I will cap off the outlet side of the pump to see if it shuts off.
This will illuminate any pressure loss in the system.