BAC Forum

General Boards => Technical Support => Topic started by: Jeff Pettit on February 22, 2022, 06:12:29 PM

Title: Black tank flush replacement check valve?
Post by: Jeff Pettit on February 22, 2022, 06:12:29 PM

The check valve to my black tank flush is stopped up or broke. Tried several things to clean it out but it still won't take water.  Looking for a replacement found this one but it's black and mine is grey... does that make a difference?

https://www.camperid.com/thetford/1-2-mpt-black-plastic-check-valve-mpn-94212.html

Title: Re: Black tank flush replacement check valve?
Post by: Robert Lawrence on February 22, 2022, 10:02:54 PM

Mine actually split and started spraying water under the sink!!!!

I used a (1) male and (1) female 1/2 pvc fittings and a short section of pipe to replace it.  I decided to do that because i didnt want to cut the pex in order to twist the check valve fitting back on.  Less than $4 dollars to fix but that valve will work just fine

Title: Re: Black tank flush replacement check valve?
Post by: Jeff Pettit on February 23, 2022, 02:51:13 AM

Thanks for the info, I may do something like that.

Title: Re: Black tank flush replacement check valve?
Post by: Fred Brooks on February 23, 2022, 01:14:42 PM

    Jeff,
I think what you are looking for is the vacuum breaker that is above the floor line. The flush water goes from the connection in the water bay to the vacuum breaker first and then to the flusher fittings attached to the waste tank. The reason for the vacuum breaker is to isolate the waste tank from the fresh water supply. Hope this helps, Fred