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Old 06-13-2021, 08:41 AM   #1
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Newmar Owners Club
Join Date: Feb 2012
Location: Lake Wales, FL (Lake Ashton RV Community)
Posts: 926
Macerator Hose Pressurizing???

I know that I have a water bypass issue in one of the water valves as my 12v water pump cycles about every 45 seconds.

But what I donít understand is how my Macerator Hose is filling with water which in turn (caps on) will pressurize the the hose, which will pressurize the Macerator Pump which will then begin to leak, filling the water bay and then leaking out.

I am clueless how this can happen. Help!
Dan Leininger
2019 Mountain Aire 4534 and a 2017 Ford Expedition 4x4
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Old 06-13-2021, 09:52 AM   #2
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Newmar Owners Club
Spartan Chassis
Join Date: Oct 2014
Location: Lake McClure, CA
Posts: 1,296
Sounds like you left the grey or black dump valve open. I have done this before but nothing leaked.
2018 Dutch Star 4369 Spartan Chassis
2016 Jeep Cherokee, 1952 Willys CJ3A
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Old 06-13-2021, 11:32 AM   #3
"Formerly Diplomat Don"
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Newmar Owners Club
Join Date: Apr 2005
Location: Moorpark, Ca.
Posts: 18,979
You've got a leaking grey or black tank valve. With the SaniCon connected to the 3" discharge, you won't notice a leak, but if you had it capped off, every time you remove the drain cap, you would have build up, behind the cap. The leak is going through the bypass and filling the hose.

Easy to check, remove the SaniCon 3" hose, close the valves and leave a drip pan under the 3" discharge.
Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2019 Ford Raptor
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ace, hose, macerator

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