HELP - water hammer and rainbird valve failure
Tim C.
since I moved in 4 years ago. When the valves cycle, there is some
water hammer in the house. I've been told we have high pressure but I
don't know for sure. I've had several Rainbird 100-DV valves fail,
each time splitting/cracking on top of the valve above the inlet port.
I called rainbird and they said it has nothing to do with high
pressure. They suggested I install a water hammer arrestor and
possibly also a ball valve on the inlet to the valves and close it
partially.
Since I've got to dig it all up again anyway, I was thinking of going
all out and installing a regulator along with a pressure gauge, and a
water hammer arrestor and ball valve.
I'm really sick of digging into my flower bed and redoing valves. Any
suggestions or ideas?
Game Player No. 1058
sprinkler valves, they used to go bad at least 1's per season, sometimes
twice, so I replaced them with a cock and ball valve only. Now I have more
pressure than I need. It was odd, Im sure the experts are right, and more
knowledgable than I, but the waterguy in my neighborhood told me that with
the current 110 psi pressure I could run about 4 to 5 rainbirds at one time,
when in reality 5 on a sprinkler valve were too much, but 8 on no sprinkler
valve and just a ball and cock valve proves more than ample, infact now that
Ive got my eye on the local hardware stores rental of trenchers, I may just
add a couple more rainbirds just to make sure Im covered properly. All on
one pipe, one cock and ball valve.
My sprinkler valves used to fail in the same place and or just restrict the
flow down to almost 10psi.
I dont get any waterhammer noises in my house, though I have a water hammer
installed in the garage next to my laundry machines.
"Tim C." <fs...@volcanomail.com> wrote in message
news:399504c6.02082...@posting.google.com...
Profundus
inertia of the moving water in the pipes is transferred to the pipes causing
them to rattle if loose or improperly fastened. You could always go around
the house installing pipe clamps if the water pipe is accessible to prevent
the noise.
A water hammer arrestor is nothing more than a coil of copper pipe installed
vertically on a horizontal pipe. It does not affect the noise caused by
loose pipes, but it does limit the sudden pressure build-up caused by a
sudden stoppage of water flow. So it may save those valves without the need
for a pressure regulator.
"Tim C." <fs...@volcanomail.com> wrote in message
news:399504c6.02082...@posting.google.com...
zhanataya
<nos...@allowed.com> wrote:
> It was odd, Im sure the experts are right, and more
>knowledgable than I, but the waterguy in my neighborhood told me that with
>the current 110 psi pressure
Maybe I don't completely understand the principles of psi, but
wouldn't 110 be strong enough to blow holes in your bathtub?
zhan
Mark
I'm looking at the rain bird book and it sayes that the valves can
handle 15 to 150 psi. Have you tried another kind of valve? Like the
hunter valves? If you have 100 psi that is a lot of pressure for city
water. Yu might want to install the pressure regualator it sounds like
it would be a great idea. Let me know if you need some good quality
supplies.
Oliver Frank
more determines how many heads one can run at one time than pressure.
Each head uses a given amount of gallons per minute, and given sizes
of pipe can only provide given quantities of gallons per minute. I
have had problems with Rainbird plastic valves, and now use
Weathermatic. Old brass Superior valves were notorious for closing too
fast.