Go Back   iRV2 Forums > MOTORHOME FORUMS > Class C Motorhome Discussions
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 09-01-2015, 06:23 PM   #15
Senior Member
Ford Super Duty Owner
Join Date: Jan 2011
Location: Lowell, Arkansas
Posts: 5,058
One word of caution when using air to blow out the lines. It is always best to start the pressure at zero with one faucet open inside. Using a regulator at the coach increase the pressure and once that starts pushing the water out I increase the pressure to about 20 PSI. Then go inside open the next faucet and close the first. Continue going from faucet to faucet until all the lines are blowing air and water. Once most of the lines are cleared increase your pressure to what ever you feel comfortable.

Why do this??? Have you ever heard water pipes rattling in a house when you open and close a faucet?? You get a wall of water moving with 40-60 PSI pushing it and slam the faucet shut that wall of water has to come to an abrupt halt. That causes pipes to shake and rattle. It's just not good for plastic lower pressure lines either.


TeJay Auto Instructor/4-yrs USAF/ Liz: RN/ WBGO 2014 Vista 30T/ F-53/CHF/5-Star/Koni * Bella & Izzy * Golden /Cocker mix/ Louie The Cat* All Retired
TeJay is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 09-01-2015, 06:41 PM   #16
Senior Member
wa8yxm's Avatar
Damon Owners Club
Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 23,989
Pink stuff smells different from automotive but... I recommend blowing out the lines

You get a special screw in adapter from Wal*mart or any RV dealer

You set your compressor's regulator at 50 PSI

NOTE..... YOU MUST USE A TANK TYPE COMPRESSOR a tankless simply will not push the volume you need.

Let the compressor pump it up.. Open everything Drain water heater and bypass.. BLOW till you run out of air or no more water comes out.

let it pump back uip and cycle the Ice maker to suck water out if its lines

Blow again.. Cycle again (Ice maker)

Blow again LIke 10 times.

Close valves and the fresh system is done

use pink stuff in drains and traps. and toilets.

Home is where I park it!
wa8yxm is offline   Reply With Quote
Old 09-01-2015, 07:02 PM   #17
Senior Member
Skip426's Avatar

Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 15,635
Yes , blowing the lines properly is a good way to winterize most of the RV's water system; BUT; blowing the lines will not clear the water from the 12v water pump, or the pick-up line between the pump and the fresh tank, and depending on the RV, the line between the pump and the city water hook up.
When your done blowing the lines , remove the connections from the 12v water pump and drain the lines there and start the pump with the lines off to run it dry , or , preferred remove the pump and store in a heated area.

Please do not ask why I developed this method, or why I rec-commend doing things this way.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
Skip426 is offline   Reply With Quote
Old 09-02-2015, 06:26 AM   #18
Senior Member
Join Date: Sep 2011
Location: South West Michigan
Posts: 399
First off don't be in a hurry just walk around several times blowing things out . From to back then back to front or whatever. If you have a rinse hose at the sink when your done take it off just incase there's water left in it and I always take the shower hose off and leave all the valves open. As far as the pump i run it off and on as I'm blowing down. Just make a relaxing day of it while your doing other things water will move around while it's sitting. Have the grill going and your favorite cold one to make the process more relaxing.
mikell is offline   Reply With Quote
Old 09-09-2015, 04:26 PM   #19
Senior Member
38Chevy454's Avatar
Join Date: Aug 2013
Location: Cincinnati, OH
Posts: 749
Also, remove your water heater anode or elec heater element so the heater tank can drain.
2005 Kenworth Showhauler truck conversion.
. 44 ft, Cummins ISX15 450 hp, 10 speed, twin screw
I used to have a handle on life, but it broke
38Chevy454 is offline   Reply With Quote
Old 09-09-2015, 04:56 PM   #20
Senior Member
Moonrover's Avatar
Join Date: May 2013
Posts: 1,685
Similar to my method, however this is my opportunity to back flush the accumulated stuff in the bottom of the hot water tank. I have a short hose that I attach to the water heater bottom drain, then run it outside on the ground. White sludge gets pushed out first then eventually clear water.

Oh, the washing machine ... mine has dedicate drains for the water lines. Hope I never forget those ... RV washing combos are expensive.

I'm old, so I have a printed check list to keep my brain straight.
Moonrover is offline   Reply With Quote
Old 09-09-2015, 05:00 PM   #21
Senior Member
Commercial Member
Join Date: Aug 2012
Posts: 674
I have used the blow out method for close to 40 years. After making sure you have blown everything out, open all faucets and low point/water heater drains. Any little water left will have room to expand when it freezes.

Don't forget the outside shower valves, and washer/dryer and washer pump. Pour a little antifreeze in each sink drain, shower drain, and toilet.

Sent from my iPad using iRV2 - RV Forum
TravellingRVDoctor, LLC

Traveling RV Doctor
shiggs68 is online now   Reply With Quote


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Low Water Pressure on City Water NINK Monaco Owner's Forum 15 06-09-2017 08:15 AM
MADP - Water System Purge Road-Chi Newmar Owner's Forum 1 02-02-2015 08:30 AM
Slide crimps water lines, drain and lp line msg1951 Monaco Owner's Forum 3 01-18-2015 04:39 AM
97 Allure - Water Connections & Overflow Issues customfab Country Coach Owners Forum 2 12-09-2014 09:42 AM
Using coach air to blow out water system Procyon Class A Motorhome Discussions 9 05-01-2014 09:04 AM

» Featured Campgrounds

Reviews provided by

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 08:10 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.