We've always had weak water delivery as told here:
After I got the initial issue debugged (air leak at intake) the pump was still noisy and seemed to have a backflow leak so I decided to upgrade and also add an accumulator.
IRVWPC pump controller ($200 - this is what makes things quiet)
New 4008 series pump
(kept the old as a spare - FWIW this is the OEM unit)
Accumulator (smoothes water flow even more)
High Level steps:
- Remove paneling to access pump
- Disconnect old pump (electrical, pipes)
- Unscrew the rubber feet from the floor
- Place new pump, connect inlet hose
- Connect IRVWPC water sensor to outlet
- Connect Accmulator to water sensor
- Connect Accumulator outlet to AS plumbing
- Screw in rubber feet of pump, Accmulator
- Double check all fittings
- Connect electrical, prime the system
- Connect IRVWPC sensor - done!
- Did not cut any PEX pipes or electrical wires, everything was done with NPT fittings and their included rubber gaskets.
- Be prepared to visit HD to purchase the replacement rubber gasket for the inlet/outlet pipes removed from the old pump. (I would not reuse when going through an overhaul although they didn't appear damaged)
- Also purchased a street elbow, this one will require either pipe cement or tape which I already had
- Some water dribbles out at disassembly, have a towel nearby
- I used one of the 'quiet kit' hoses to connect the new pump inlet but didn't use the other one since they're very long.
- Instead I purchased another 1/2" diameter 'Lavatory hose' to connect the Accumulator, this allows it to sit near the pump in a natural position with the air valve easily accessible
- After connecting everything loosely I screwed down the pump & accumulator. This is by far the most difficult step since there is little space to work. I let all components align themselves naturally rather than forcing them to be in any particular direction. Both still very easy to access should I need to.
- Then I tightened the pipe fittings, making sure they're in a natural position with no kinks.
- Connected electrical: Controller RED & BLACK to Pump RED & BLACK; Controller YELLOW to AS +12V; Controller WHITE to AS WHITE
- Turn on power, Primed the system, then turn off power
- Connect Controller sensor, restore power, all done
- I left most Controller DIP switches at the factory settings, only change was to switch #6 to 'ON' (emergency shutoff)
The system is now amazingly quiet!
Just as expected we can 'drizzle' water from the faucet without issue or let it run full blast. One can hardly notice the pump. Looking forward to our next boondocking trip
The pump is located under the stove on the 2019 28RBT
Open the hatch and remove the thin plywood panel
Remove the old pump
Note: These little seals will fall out! Turns out they're "cone gaskets".
Where to get replacement 'cone gaskets'?
- Home depot carries these PEX fittings and you may harvest the gaskets (discard the fittings)
Old pump removed:
To create space I attached the AC hose to the cabinet with a DIY 'sling':
The accumulator with hoses attached, plus the water sensor
The pump controller already came with one steel braided hose.
I purchased another from HD for the outlet side:
1/2" Street Elbow from HD for the final connection
Everything buttoned up!