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Old 07-08-2019, 04:54 PM   #1
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Upgrading Water Pump to Higher Volume Output

I've been considering upgrading my WP to one with a higher VOLUME output, not higher pressure. Wanted to see if anyone else has done so and what the results are, if it's worth it, noticeable difference, etc. Seems like my water pressure and volume aren't very good just running off the pump and I figured one putting out more volume would help. It'll cost around $200 for the higher volume pump which is rated at 5.5gpm @60psi, almost double the volume of mine which is rated at 3.3gpm. TIA for any input!
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Old 07-08-2019, 05:50 PM   #2
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Physics control what you want, the given plumbing ID and length controls flow volume at a given pressure, the only way to increase flow rate in the same size piping is increase pressure. The easy explanation is, when the pipe is full of water the only way to increase flow rate is increase pressure.
FYI, Most RV plumbing is tested to 60 PSI maximum. A separate issue is (if you have one) an ice maker. The ice maker controls how long the water solenoid opens to allow water flow to the ice maker tray. When pressure is increased more water enters the freezing tray, most ice makers are designed to operate at 35 psi, which controls water flow rate.RV Ice makers have a limited adjustment to control how long the water solenoid is held open, which determines cube size.
Ref: page 3 of http://bryantrv.com/docs2/docs/icemaker.pdf
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Old 07-08-2019, 06:51 PM   #3
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If you're talking about switching to the Remco Aquajet 55AVR, then I highly recommend this pump.

I switched from a Shurflo 2088 and then a Shurflo 4008 rated at 50 psi @ 60 gpm.

The Aquajet is rated at 65 psi @ 5.3 gpm. After several years of operation, so far the plumbing in my 2001 Newmar hasn't blown up.
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Old 07-08-2019, 07:48 PM   #4
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Originally Posted by Ray,IN View Post
Physics control what you want, the given plumbing ID and length controls flow volume at a given pressure, the only way to increase flow rate in the same size piping is increase pressure. The easy explanation is, when the pipe is full of water the only way to increase flow rate is increase pressure...
True, except for when you want to be able to run multiple fixtures at the same time, like take a shower while someone washes dishes. Then having the extra flow rate is key. All the pressure in the world is not going to fix a low flow rate in a situation like this.
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Old 07-09-2019, 09:09 AM   #5
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True, except for when you want to be able to run multiple fixtures at the same time, like take a shower while someone washes dishes. Then having the extra flow rate is key. All the pressure in the world is not going to fix a low flow rate in a situation like this.
l think we're talking the same thing in different terms, flow rate is expressed in ft/min., higher pressure will increase flow rate. When multiple outlets are opened the flow rate remains the same in the pipe, but is reduced at each of the multiple outlets.
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Old 07-09-2019, 09:37 AM   #6
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FYI, Most RV plumbing is tested to 60 PSI maximum.

That's old info. RVIA standards are higher now and the last edition I saw required a pressure test of at least 80 psi. I've heard it was increased again to 100 psi but cannot verify that except that Rev Group manufacturing claims they test to 100 psi.
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Old 07-09-2019, 09:55 AM   #7
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RVIA Certified Tech Test............100 psi


Increase flow....
Remove the flow restrictors in the sink faucet aerators AND shower (in hose or handle)


Restrictors in aerators are removalble
Restrictors in shower hose/handle may be.....or may need to be enlarged using a 1/4" drill bit


Flow WILL increase w/o them.
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Old 07-09-2019, 10:02 AM   #8
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That's old info. RVIA standards are higher now and the last edition I saw required a pressure test of at least 80 psi. I've heard it was increased again to 100 psi but cannot verify that except that Rev Group manufacturing claims they test to 100 psi.
I have an old RV, whereupon I based my statement.
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Old 07-09-2019, 10:17 AM   #9
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I agree with Techwriter. When our pump failed I upgraded to the Remco Aquajet variable speed 5.3. It's a great pump and has worked well.
https://www.campingworld.com/aquajet...efault&start=1
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Old 07-09-2019, 12:12 PM   #10
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I agree with Techwriter. When our pump failed I upgraded to the Remco Aquajet variable speed 5.3. It's a great pump and has worked well.
https://www.campingworld.com/aquajet...efault&start=1
That webpage says 3.5gpm below in the verbage, which is correct?

"Powerful Flows
The ES delivers a 3.5 gpm flow rate, higher than nearly anything else for the RV industry. Reduced power consumption helps ensure compatibility with existing electrical systems."
EDIT: I found the info, 5.3 gpm @ 65psi, which draws 10A. Camping World must use cheap labor.
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Old 07-09-2019, 12:58 PM   #11
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Originally Posted by Gary RVRoamer View Post
That's old info. RVIA standards are higher now and the last edition I saw required a pressure test of at least 80 psi. I've heard it was increased again to 100 psi but cannot verify that except that Rev Group manufacturing claims they test to 100 psi.
Tiffin test theirs from the factory at 100psi.
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Old 07-09-2019, 01:43 PM   #12
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We also upgraded to the Aquajet ARV variable speed pump, installed when we had our automatic water softener installed. Itís been great. We take all of our showers using the pump and really like, as someone else already said, that you can flush the toilet and wash your hands while the toiletís refilling.
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Old 07-09-2019, 04:40 PM   #13
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Originally Posted by Ray,IN View Post
That webpage says 3.5gpm below in the verbage, which is correct?

"Powerful Flows
The ES delivers a 3.5 gpm flow rate, higher than nearly anything else for the RV industry. Reduced power consumption helps ensure compatibility with existing electrical systems."
EDIT: I found the info, 5.3 gpm @ 65psi, which draws 10A. Camping World must use cheap labor.
There are several versions of RV Aquajet water pumps (BTW, shop around for price. Camping World wouldn't be my first stop):

Variable-Speed Pumps:
Single-Speed Pumps (also called the "Rebel"): -- less expensive, but more current draw, than the variable speed pumps
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Old 07-09-2019, 04:49 PM   #14
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Thumbs up

Thanks to the OP for starting this thread. I have been wanting to do the same thing but had the same questions.
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