How to run antifreeze through a power washer?

Old 09-23-18, 07:44 AM
Thread Starter
Join Date: Jun 2011
Location: USA
Posts: 309
Received 0 Upvotes on 0 Posts
How to run antifreeze through a power washer?

According to youtube, attach a hose filled with antifreeze to the water inlet and pull the chord (without running the engine), and antifreeze will flow through. Not so with my power washer. Advice please.
Old 09-23-18, 10:33 AM
Forum Topic Moderator
Join Date: Mar 2005
Location: USA - N.E.Tn
Posts: 45,619
Received 824 Upvotes on 722 Posts
I never knew you were supposed to winterize a pressure washer until reading it on the forums a number of years ago. What I've always done is to pull the rope a few times after the water is disconnected to expel any water left in the pump. I always disconnect/remove the hose/wand when I finish [before expelling the water] This method has worked well for me for over 40 yrs.
Old 09-23-18, 07:25 PM
Geochurchi's Avatar
Join Date: Nov 2012
Posts: 5,064
Received 159 Upvotes on 145 Posts
What does the mfg. recommend? I never use antifreeze unless it is of the RV type.
Old 09-24-18, 04:37 AM
GregH's Avatar
Super Moderator
Join Date: Jan 2001
Location: Manitoba
Posts: 9,500
Received 68 Upvotes on 62 Posts
You would use RV antifreeze.
Connect a short hose to pressure washer like a clotheswasher hose.
Hold the hose above the washer and fill with antifreeze then put end into antifreeze container.
Start pressure washer and hold wand trigger open until antifreeze comes out of wand.
Once you get antifreeze out of wand with washer running release trigger to allow pump to bypass which will protect bypass valve from freezing.

You should be able to winterize a washer with about a half gallon of antifreeze.
Old 09-24-18, 09:41 AM
Marq1's Avatar
Join Date: Sep 2016
Location: USA MI
Posts: 9,745
Received 1,210 Upvotes on 1,098 Posts
Every pump I have ever owned has a drain plug?
Old 09-25-18, 08:07 AM
Join Date: Nov 2007
Location: MI
Posts: 2,364
Upvotes: 0
Received 2 Upvotes on 2 Posts
Removing a plug won't get out the water trapped in the cylinders (fragile ceramic pistons) or the regulator. Brass cracks easily when water freezes inside and (good) pumps are expensive to replace.

Thread Tools
Search this Thread
Ask a Question
Question Title: