The 4 inch pipe the check valve exits the vault into the dirt. I am sure that is the reason for the tar. And this pipe is threaded.c but does have a flange on the check valve.
I thought about flushing the valve. After drilling a hole in the 4 inch pipe, & installing a mechanical tee, I could shutt off the OS&Y valve, drain the system. Would a garden hose have enough pressure to back flush the check valve? That would be much easier than having the FD bring a pumper down and flush the valve. Thank you for the responses. -------------------------------------------------- From: "Doug Hicks" <[email protected]> Sent: Friday, March 19, 2010 8:03 AM To: "sprinkler board" <[email protected]> Subject: Install an Automatic drip valve > This question is a continuation of my previous post about a FDC and a > Cla-Val. There is no drip drum on the FDC piping. As per NFPA 13-20202, > Section 8.16.2.6, there is to be an automatic drip valve. The pipe that > needs the valve is covered with a tar. After drilling the pipe, is there > a problem scraping the tar off? I do not thing the mechanical tee will > seal with the tar in place. After scraping the tar off, is rust going to > be a problem? > > Douglas Hicks > General Fire Equipment Co of Eastern Oregon, Inc > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > For Technical Assistance, send an email to: [email protected] > > To Unsubscribe, send an email to:[email protected] > (Put the word unsubscribe in the subject field) > _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
