Re: What would happen if I just bypassed this garden water check valve?

[Danny D.]

On Tue, 06 Nov 2012 07:19:28 -0800, rlz wrote:

> I agree with the prior posts that the backflow preventer is necessary.

OK. I don't disagree. It's there for a reason.
I'm going to try to understand the thing and then repair it.

BTW, I can't tell if it's a 1" or a 1.5 inch opening
because it clearly has a "1" stamped on each opening
but it's just as clearly got a >1" pipe going in and out.

Here, for example, is a ruler next to the pipe and
a yellow circle around the 1.
LARGE: http://www3.picturepush.com/photo/a/11346746/img/11346746.jpg
SMALL: http://www3.picturepush.com/photo/a/11346746/640/11346746.jpg

Notice the pipe is actually about 1 3/8ths in diameter, so it's
neither 1 inch nor 1.5 inch.

Q: What size would you say this Wilkins Zurn 975XL actually fits?

[Ralph Mowery]

"Danny D." <dann...@yahoo.com> wrote in message
news:k7bccl$nua$2...@speranza.aioe.org...

> Notice the pipe is actually about 1 3/8ths in diameter, so it's
> neither 1 inch nor 1.5 inch.
>

You do realize that pipe is not really measured like it is called ?
That is what is called one inch pipe will actually measuer about 1.3 inches
outside diameter with a ruler.


http://www.pipemarkers.com/pipe-data.php

This is a pipe chart for sizes.

[Danny D.]

On Tue, 06 Nov 2012 12:08:56 -0500, Ralph Mowery wrote:

> You do realize that pipe is not really measured like it is called ?

I do now!

Thanks.

[dadiOH]

Danny D. wrote:
> On Tue, 06 Nov 2012 07:19:28 -0800, rlz wrote:
>
>> I agree with the prior posts that the backflow preventer is
>> necessary.
>
> OK. I don't disagree. It's there for a reason.
> I'm going to try to understand the thing and then repair it.
>
> BTW, I can't tell if it's a 1" or a 1.5 inch opening
> because it clearly has a "1" stamped on each opening
> but it's just as clearly got a >1" pipe going in and out.
>
> Here, for example, is a ruler next to the pipe and
> a yellow circle around the 1.
> LARGE: http://www3.picturepush.com/photo/a/11346746/img/11346746.jpg
> SMALL: http://www3.picturepush.com/photo/a/11346746/640/11346746.jpg

Wrong place. Measure at the pipe into the check valve. Actually, it
doesn't much matter...get the size check valve necessary - I'd think 1 1/2"
would be very generous - and use pipe fittings as needed to marry it to the
pipe. Do you plan to keep the shutoff valves?

--

dadiOH
____________________________

Winters getting colder? Tired of the rat race?
Maybe just ready for a change? Check it out...
http://www.floridaloghouse.net

[Danny D.]

On Tue, 06 Nov 2012 13:46:34 -0500, dadiOH wrote:

> Measure at the pipe into the check valve. Actually, it
> doesn't much matter...get the size check valve necessary - I'd think 1 1/2"
> would be very generous - and use pipe fittings as needed to marry it to the
> pipe. Do you plan to keep the shutoff valves?

I ordered the repair kit - so I'm just waiting for it to arrive.

[tra...@optonline.net]

On Nov 6, 12:08 pm, "Ralph Mowery" <rmowery28...@earthlink.net> wrote:
> "Danny D." <danny...@yahoo.com> wrote in message

>
> news:k7bccl$nua$2...@speranza.aioe.org...
>
> > Notice the pipe is actually about 1 3/8ths in diameter, so it's
> > neither 1 inch nor 1.5 inch.
>
> You do realize that pipe is not really measured like it is called ?

It is measured exactly as it's called, by INSIDE diameter.

[Ralph Mowery]

<tra...@optonline.net> wrote in message
news:167a4efc-c9d3-4701...@m13g2000vbd.googlegroups.com...

On Nov 6, 12:08 pm, "Ralph Mowery" <rmowery28...@earthlink.net> wrote:
>
>> You do realize that pipe is not really measured like it is called ?

>It is measured exactly as it's called, by INSIDE diameter.

Not EXACTLY.. It depends on the thickness of the pipe. Schedule 40 pipe
is 1.049 inches inside, and sched 80 is .957 inches inside.

Pipe is the same outside diameter so it will all thread together for the
same size. Some pipe has thicker walls than others so the only way to go is
to make the inside diameter smaller.

Again look at the chart.

http://www.pipemarkers.com/pipe-data.php

[Danny D.]

On Fri, 09 Nov 2012 14:22:14 -0800, Oren wrote:

>> This garden Wilkins Zurn water check valve is leaking:
>> SMALL: http://www2.picturepush.com/photo/a/11343535/640/11343535.jpg
>> LARGE: http://www2.picturepush.com/photo/a/11343535/img/11343535.jpg
>
> What do you find when you clean the valve? (sand, small pebbles,
> some other debris)

UPDATE:
Thanks for all your help & advice!
My backflow preventer is now repaired & no longer leaking water.
A 15-step pictorial DIY is attached below.

SUMMARY:
I found all the parts inside the three valves in excellent condition
as you had suggested it would be - but I replaced them all anyway.

The key problem I saw was the #2 check valve was stuck in place
due to light-green corrosion inside the brass cap cavity.

Also there was light-green corrosion in all cavities, which I
painstakingly wire brushed out - as that was the key issue.

On a scale of 1 to 10, this is an easy 1. No surprises. No special
tools. It took me about three hours - one hour for the #1 check
valve on the top inlet, another hour for the #2 check valve on the
bottom outlet, and another hour for the relief valve on the inlet.

It should take you about a half hour in total - maybe 45 minutes,
depending on how well you wish to clean out the green corrosion.
I took my sweet time.

Below is a quick DIY with photographs for the $755 1-inch ID
Zurn Wilkins 975XL Reduced Pressure Principle Backflow Preventer
(http://www.zurn.com/Pages/ProductDetails.aspx?NodeKey=377206)
after detailing the 11-piece Wilkins Water Works RK34-975XL $43.20
repair kit (855-663-9876) and assembly instructions.

STEP 0 of 3: Shut inlet & outlet valves & open #2,#3,&#4 test ports
STEP 1 of 3: Repair #1 check valve on top inlet
STEP 2 of 3: Repair #2 check valve on bottom outlet
STEP 3 of 3: Repair relieve valve on side inlet

Here is a step-by-step DIY in 15 annotated photographs:
http://www2.picturepush.com/photo/a/11462795/img/11462795.jpg
http://www3.picturepush.com/photo/a/11462796/img/11462796.jpg
http://www4.picturepush.com/photo/a/11462797/img/11462797.jpg
http://www1.picturepush.com/photo/a/11462799/img/11462799.jpg
http://www2.picturepush.com/photo/a/11462800/img/11462800.jpg
http://www3.picturepush.com/photo/a/11462801/img/11462801.jpg
http://www4.picturepush.com/photo/a/11462802/img/11462802.jpg
http://www5.picturepush.com/photo/a/11462803/img/11462803.jpg
http://www1.picturepush.com/photo/a/11462804/img/11462804.jpg
http://www2.picturepush.com/photo/a/11462805/img/11462805.jpg
http://www4.picturepush.com/photo/a/11462807/img/11462807.jpg
http://www5.picturepush.com/photo/a/11462808/img/11462808.jpg
http://www1.picturepush.com/photo/a/11462809/img/11462809.jpg
http://www2.picturepush.com/photo/a/11462810/img/11462810.jpg
http://www3.picturepush.com/photo/a/11462811/img/11462811.jpg

REFERENCES:
Wilkins Zurn 975XL Specification Sheet
http://content.zurn.com/web_documents/pdfs/installation/ISSM950.pdf
http://content.zurn.com/web_documents/pdfs/specsheets/BF-975XL(lg).pdf

Wilkins Zurn 975XL Maintenance Sheet
http://content.zurn.com/web_documents/pdfs/installation/ISSM950.pdf

[Krazy Old Man]

Jumping in late but just so you know...

Plumbers are odd folks compared to carpenters. A carpenter wants to know
how big a hole to drill for the pipe to fit through. The plumber measures
the inside diameter to know how much water he can get to flow through it.

I've had many a weekend warrior insist the 1/2" pipe he has in his hand is
really 3/4" and he is right as far as the size hole he needs to drill in the
joist but not as far as what should be on the label of the fittings he
needs. Let's face it, all the labels in my and every other store can not be
wrong so the way you look at it needs to be adjusted.

"Danny D." <dann...@yahoo.com> wrote in message

news:k7bgea$3rm$1...@speranza.aioe.org...