Go Back   Thor Forums > Thor Tech Forums > Maintenance and Repair
Click Here to Login
Thread Tools Display Modes
Old 08-07-2018, 12:12 AM   #1
Brand: Thor Motor Coach
State: British Columbia
Posts: 30
THOR #12644
Max plumbing pressure thor motorhomes

I recently bought a 2010 Cruise America rental return. (28A) I want to upgrade the water pump from a 3 GPM unit to 4 GPM. The original unit had 45 PSI stop & 25 PSI restart. The new one is 55 PSI stop & 40 PSI restart. Doe sanyone know what the PSI plubing rating is in a motorhoem of this year? If its 100, then i am OK, if its only 60, then its pushing it. The wife does not like how the dometic toilet flushes or the shower pressure, so the pump ugrade would help that. I never hook to city water, I always fill the tank & use the pump. Mainly as I RV in Mexico for 6 months and the city pressure there is terrible.

telcoman is offline   Reply With Quote
Old 08-07-2018, 03:46 AM   #2
Senior Member
Yvonnemarc's Avatar
Brand: Thor Motor Coach
Model: ACE 30.2
State: Massachusetts
Posts: 260
THOR #8180
Normal city pressure is 45-60 PSI so that should be good. If they are PEX lines in 2010? they are pretty resiliant but i'd dare say 100 PSI. I almost never use my pump but use city water as I have an adjustable pressure regulator. I have yet to encounter too low of city pressure or that which I can't adjust to suit my needs.

Taunton, MA
Yvonnemarc is offline   Reply With Quote
Old 08-07-2018, 12:54 PM   #3
I Think We're Lost!
Bob Denman's Avatar
Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 12,128
THOR #8860
Welcome to the forum... and a lot of folks seem to set their adjustable regulators up near 55 psi: you should be okay!
Good Sam Member 843599689
FMCA Member F473304
Current coach: Tiffin Wayfarer 24 BW
"History shows again and again; how Nature points
out the folly of man..."
Bob Denman is offline   Reply With Quote
Old 08-07-2018, 05:40 PM   #4
Brand: Thor Motor Coach
Model: Outlaw 37LS
State: Florida
Posts: 77
THOR #7274
Look near your city water inlet....my Outlaw has it clearly imprinted that the max psi is 100... i do not get near that and keep my regulator about 60-70 if i can get that much at a park
JeffnBeth is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Featured Campgrounds

Reviews provided by


This website is not affiliated with or endorsed by Thor Industries or any of its affiliates. This is an independent, unofficial site.

All times are GMT. The time now is 04:13 PM.

Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0 PL2