I'm replacing the indoor section of the plumbing that feeds our
sprinkler system. The old PVC threaded fittings screwed in far enough
that the shoulder of the fitting contacted the body of the vacuum
breaker, but the new fittings bottom in the VB with more than 1/2 in. of
thread still showing. Would it be a good idea to cut enough off the
threaded portion of the PVC fittings so that none of the threaded part
(which I assume is the weakest part) is unsupported by the body of the VB?

Perce

Perce,

I'm replacing the indoor section of the plumbing that feeds our
sprinkler system. The old PVC threaded fittings screwed in far enough
that the shoulder of the fitting contacted the body of the vacuum
breaker, but the new fittings bottom in the VB with more than 1/2 in.
of thread still showing. Would it be a good idea to cut enough off the
threaded portion of the PVC fittings so that none of the threaded part
(which I assume is the weakest part) is unsupported by the body of the
VB?

Having exposed thread won't cause any problems, in fact that's how most
threaded fittings end up.

If the vacuum breaker is heavy enough that you're worried about it, it
would be smarter to install some kind of strap to carry the weight of the
VB.

Anthony Watson
www.mountainsoftware.com
www.watsondiy.com

On 06/20/14 11:58 pm, HerHusband wrote:

Perce,

I'm replacing the indoor section of the plumbing that feeds our
sprinkler system. The old PVC threaded fittings screwed in far enough
that the shoulder of the fitting contacted the body of the vacuum
breaker, but the new fittings bottom in the VB with more than 1/2 in.
of thread still showing. Would it be a good idea to cut enough off the
threaded portion of the PVC fittings so that none of the threaded part
(which I assume is the weakest part) is unsupported by the body of the
VB?

Having exposed thread won't cause any problems, in fact that's how most
threaded fittings end up.

If the vacuum breaker is heavy enough that you're worried about it, it
would be smarter to install some kind of strap to carry the weight of the
VB.

Thanks, Anthony. The vacuum breaker was already -- and still will be --
supported by straps.

Perce

Percival P. Cassidy wrote:
I'm replacing the indoor section of the plumbing that feeds our
sprinkler system. The old PVC threaded fittings screwed in far enough
that the shoulder of the fitting contacted the body of the vacuum
breaker, but the new fittings bottom in the VB with more than 1/2 in.
of thread still showing. Would it be a good idea to cut enough off the
threaded portion of the PVC fittings so that none of the threaded part
(which I assume is the weakest part) is unsupported by the body of
the VB?

If the thread only goes part way into the VB, and you cut off the part that will
fit into the VB threaded hole, it won't go together. Just use it the way it
fits.

On Sat, 21 Jun 2014 07:40:02 -0400, Nobody
wrote:

On 06/20/14 11:58 pm, HerHusband wrote:

Perce,

I'm replacing the indoor section of the plumbing that feeds our
sprinkler system. The old PVC threaded fittings screwed in far enough
that the shoulder of the fitting contacted the body of the vacuum
breaker, but the new fittings bottom in the VB with more than 1/2 in.
of thread still showing. Would it be a good idea to cut enough off the
threaded portion of the PVC fittings so that none of the threaded part
(which I assume is the weakest part) is unsupported by the body of the
VB?

Having exposed thread won't cause any problems, in fact that's how most
threaded fittings end up.

If the vacuum breaker is heavy enough that you're worried about it, it
would be smarter to install some kind of strap to carry the weight of the
VB.

Thanks, Anthony. The vacuum breaker was already -- and still will be --
supported by straps.



Perce,

When you tighten down the PVC into the body, there is no need to get
heavy-handed. The fittings are easy to crack - just saying.

On Friday, June 20, 2014 11:58:40 PM UTC-4, HerHusband wrote:
Perce,



I'm replacing the indoor section of the plumbing that feeds our

sprinkler system. The old PVC threaded fittings screwed in far enough

that the shoulder of the fitting contacted the body of the vacuum

breaker, but the new fittings bottom in the VB with more than 1/2 in.

of thread still showing. Would it be a good idea to cut enough off the

threaded portion of the PVC fittings so that none of the threaded part

(which I assume is the weakest part) is unsupported by the body of the

VB?



Having exposed thread won't cause any problems, in fact that's how most

threaded fittings end up.



+1

They are tapered and are not supposed to go all the way in.
Only far enough to make them tight and not leak.