|
| A tract of modest houses near here were built about 1968 by the same builder. No-hub cast iron drains. The washer box is in the wall with 1 1/2" drain and concealed below it is an extremely deep cast iron trap with sharp bend at the bottom. It is not unusual for the washer to discharge water faster than the trap can handle it with the resulting minor overflow at the box. Even a 1/4 snake will not go through the trap due to the sharp bend at the bottom. Replacing with PVC seems to the best solution.
Other suggestions? |
Follow-Up Postings:
|
| I believe this is why washer standpipes are now required to be 2". I've always thought expanding soap foam was the culprit. In a rental, I wrapped the washer drain hose with a 2" wide strip of old innertube rubber until it was a pressure fit into the standpipe. Some duct tape for extra security and it held for several years. |
|
| seeing images of P traps, i see they are all the same shape. There is no "deep" trap option. I think a normal shaped P trap of 1.5" diameter will still work well. In Canada, the same washers work off 1.5" traps all the time. When US code got upgraded to require 2" pipe for showers and for washer standpipes, it was to allow longer distances so builders could make larger spaces. Otherwise a lot more venting had to be provided. My writing this out does not mean I know for a fact why a change in Code got voted by the committee; I'm surmising. Indulge me as I repeat the following factoid: in Canada, the exact same washing machines all work without backing up. Now, think about this. In Canada, is the distance of the 1.5" trap arm small enough to work right, or do Canadians just happen to put less soap in their soap trays? I really REALLY think that suds are not the obstacle to overcome. |
|
- Posted by bus_driver (My Page) on Wed, May 25, 11 at 9:19
| Yes, deep traps do exist and were used in this tract of homes. |
Here is a link that might be useful: Traps
Please Note: Only registered members are able to post messages to this forum. If you are a member, please log in. If you aren't yet a member, join now!
Return to the Plumbing Forum
Instructions
- You must be a registered member and logged in to post messages on our forums.
- Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review the contents and make changes.
- After posting your message, you may need to refresh the forum page in order to see it.
- It is illegal to post copyrighted material without the owner's consent.
- HTML codes are allowed in the message field only.
- No advertising is allowed in any of the forums.
- If you would like to practice posting or uploading photos, please visit our Test forum.
- If you need assistance, please Contact Us and we will be happy to help.