New Washer - Old Standpipe Backing Up

Old 10-19-06, 02:35 PM
Thread Starter
Join Date: Oct 2006
Posts: 1
Upvotes: 0
Received 0 Upvotes on 0 Posts
New Washer - Old Standpipe Backing Up

We bought a new washer 10/2006 and it immediately flooded our garage floor. The standpipe was leaking at the base anyway and I thought there was a clog so I decided to cut the old one off... augered 20 feet into the main line (which revealed nothing), repiped it and then poured virgin sulfuric acid for good measure to get rid of any buildups past the 20 foot mark. It still backed up so I got on the roof and ran a hose on full throttle and flushed the vent out. Water backed up through the standpipe then too. Is that normal?

A couple things I noticed when I did all of this was that I didn't really smell any sewer gases coming into the garage which I thought was odd so maybe the clog is really way down?? and the other thing is that the water drains... just not as fast as it needs to.

The new washer has a pump that requires a minumum 17 gal. per minute carry away rate. Is it possible that the pump is just too powerful for the existing plumbing or should I just bite the bullet and pay a plumber to run a snake further down the system?

Our house was built in 1962 and the existing plumbing is 1 1/2in cast iron and it transitions into a 2in. standpipe that measures 45inches from base to top.

I read from another site that a guy just installed a new utility tub to drain his washer into. I don't know if that would solve the problem, but I'd consider doing that too.

Thanks for any help in advance.
Old 10-19-06, 07:07 PM
chandler's Avatar
Banned. Rule And/Or Policy Violation
Join Date: Dec 2005
Location: USA
Posts: 36,607
Upvotes: 0
Received 11 Upvotes on 10 Posts
Somewhere you have a clog that is restricting a large amount of your drainage capacity. Since you have done the basics by chugging the vent pipe and attempting to clean the pipe, I would definitely call a plumber in and let him run a motorized cutter into the pipes. It is highly likely that the pipes from the house to the sewer have become ingrown with tree roots, etc, and need cleaning.

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: