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Old 11-20-2014, 10:03 PM
VanDamnMan VanDamnMan is offline
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Backflow install, should I thrust block this?

I had a backflow install on an old system with just a shut-off valve that was tied into galvi which led to a galvi service line to the house (all 1"). Up until now I've been lucky enough to have usable thread at some point but pipe is in really rough shape. When I tried to pipe wrench the fitting off it took the threads with it. . .
http://s1369.photobucket.com/user/PD...tml?sort=3&o=0

I cleaned it up the best I could and used a Romac iron coupling. This is my first attempt at using one of these. I def didn't want to go with a cheesy plastic comp coupler on the main and haven't tried to cut new threads into galvi pipe. The pipe is heavily pitted but the coupling seems to have a good seal. (sorry about blurry pic)
http://s1369.photobucket.com/user/PD...tml?sort=3&o=1

My question is - Would you thrust block this to make sure that pipe isn't going to pop out of that? Would a stick of pvc pounded a couple feet into the ground hold that or should I drop a bag of concrete next to the main to hold it? It's not backfilled yet so I can move that lateral that's running above the main.
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Old 11-21-2014, 02:10 AM
VanDamnMan VanDamnMan is offline
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Since I figured out how to get images to appear, here's the install/repair.





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Old 11-21-2014, 01:13 PM
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Wet_Boots Wet_Boots is online now
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Maybe the pipe above the repair can be used for bracing, if you can work out a way to clamp them together.
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Old 11-21-2014, 05:52 PM
Mdirrigation Mdirrigation is offline
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Is that an RPZ ? if so it does not belong in a pit . The pic is a bit blurry .
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Old 11-21-2014, 10:33 PM
VanDamnMan VanDamnMan is offline
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Quote:
Originally Posted by Mdirrigation View Post
Is that an RPZ ? if so it does not belong in a pit . The pic is a bit blurry .
No, it's a Wilkins 350 double check. Sorry about the pic quality.

I ended up pounding a piece of 1 1/4 sch 40 18 inches in the ground to brace it. Thought a little more about a sack of concrete but it seemed like overkill.
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Old Yesterday, 06:19 PM
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Wet_Boots Wet_Boots is online now
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The really good compression fittings have a grip that can surprise you. That two-bolt jobbie looks like one of the good ones.
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