You are not logged in.

Reply

Dear visitor, welcome to SPRINKLER TALK FORUM - You Got Questions, We've Got Answers. If this is your first visit here, please read the Help. It explains how this page works. You must be registered before you can use all the page's features. Please use the registration form, to register here or read more information about the registration process. If you are already registered, please login here.

Message information
Message
Settings
Automatically converts internet addresses into links by adding [url] and [/url] around them.
Smiley code in your message such as :) is automatically displayed as image.
You can use BBCode to format your message, if this option is enabled.
Security measure

Please enter the letters that are shown in the picture below (without spaces, and upper or lower case can be used).

The last 10 posts

Friday, June 8th 2018, 11:04am

by BackflowInspector

They are designed to fail in a freeze situation to blow out the plastic parts with out damaging the brass. It is common in a hard freeze situation for the Febco 765 to fail this way. It is important to try to prevent this from freezing.

Also, I know these are easy to fix. I fix plenty. I see Irrigation companies and project owners fix the leak.

But, these are supposed to be inspected by a licensed backflow prevention assembly tester.

ONLY through an Inspection with Differential Pressure Gauges can you determine that the check valve is not holding.

If the check valve is not holding you simply fixed an expensive piece of pipe that is not leaking water but not providing backflow prevention as the manufacture had designed it.

Reasons the check valve could fail

Product could be flawed coming from the distributor.

Upon charging the line with water or opening the supply to the valve the check and spring/retainer may not have seated properly.

Never inspected upon installation and debris is in the line, pvc shavings, copper shavings, Teflon, rocks, mulch, broken pieces of pipe, lizards, Glue/PVC Solvent.

Inspected and passed upon installation but repaired later and the repair was not done correctly or debris got in the line.

Or sometimes the check disc rubber simply wears out.

I am just saying.

:thumbsup:

Friday, June 8th 2018, 7:07am

by Febco 765 failure (Guest)

Febco 765 failure

X( X( I have a Febco 765. The FEBCO 765 top screw in section failed & the top blew off. Water blew out the top for 4 hours, before it was discovered. The sprinkler company put the Febco 765 next to our house and a basement window. Basement flooded with over 4 inches of water. Do these fail & the top blow off? Is this common?

Tuesday, March 18th 2008, 10:49am

by Taxman711 (Guest)

(messed up earlier post)

Got it fixed this weekend, replaced the entire 765 using the whole
assembly I bought last year. Turns out, when I winterized, I
closed the ball valve going into the PVB completely. Although I
opened the test cocks, water still existed below that point and
froze. Next year, I will either have to blow out the water coming
into the PVB or install drip drains to release the inflow water when I
shut the water off.

Tuesday, March 18th 2008, 4:08am

by Taxman711 (Guest)

Update:
Well, this year the poppett/bonnett look fine, but the
the bottom of the backflow has a 2-3 inch split just above where it
connects to the PVC coming up out of the ground and is spewing
water. I have no idea what caused pressure enough to do that over
the winter as I winterized long before it got cold. Maybe I
should just pay a pro to winterize for now on?



Got it fixed this weekend, replaced the entire 765 using the whole
assembly I bought last year. Turns out, when I winterized, I
closed the ball valve going into the PVB completely. Although I
opened the test cocks, water still existed below that point and
froze. Next year, I will either have to blow out the water coming
into the PVB or install drip drains to release the inflow water when I
shut the water off.



At least I am learning a thing or two about plumbing, etc.



I guess it was a good thing I bought an entire Febco 765-1 last year,
maybe I can use it and salvage the poppett/bonnett I used for
replacement parts last year.


Given
that the backflow is made of brass, I don't see how water pressure
could account for the split. Only water still in that part of the pipes
freezing over the winter is the only thing I can think of to account
for that sort of damage.

If I understand you correctly, this is
the pipe leading TO the backflow. If so, what (if anything) did you do
to remove water from the pipes BEFORE the backflow. This sort of seems
to be a tricky area as plumbing codes say you can't place a connection
point before the backflow that you could use to blow out that section
of the pipe. In some places, I've seen suggestions of annual removal of
the backflow. In my case, I have a filter installed upstream of the
backflow. I open the filter and get the water before the backflow out
there. To insure I get all of it back down to below ground level, I
have to siphon out some of the water through the filter
openning.

Wednesday, March 12th 2008, 12:31pm

by HooKooDooKu

Update: Well, this year the poppett/bonnett look fine, but the
the bottom of the backflow has a 2-3 inch split just above where it
connects to the PVC coming up out of the ground and is spewing
water. I have no idea what caused pressure enough to do that over
the winter as I winterized long before it got cold. Maybe I
should just pay a pro to winterize for now on?



I guess it was a good thing I bought an entire Febco 765-1 last year,
maybe I can use it and salvage the poppett/bonnett I used for
replacement parts last year.


Given that the backflow is made of brass, I don't see how water pressure could account for the split. Only water still in that part of the pipes freezing over the winter is the only thing I can think of to account for that sort of damage.

If I understand you correctly, this is the pipe leading TO the backflow. If so, what (if anything) did you do to remove water from the pipes BEFORE the backflow. This sort of seems to be a tricky area as plumbing codes say you can't place a connection point before the backflow that you could use to blow out that section of the pipe. In some places, I've seen suggestions of annual removal of the backflow. In my case, I have a filter installed upstream of the backflow. I open the filter and get the water before the backflow out there. To insure I get all of it back down to below ground level, I have to siphon out some of the water through the filter openning.

Tuesday, March 11th 2008, 4:40am

by Taxman711 (Guest)

Update: Well, this year the poppett/bonnett look fine, but the
the bottom of the backflow has a 2-3 inch split just above where it
connects to the PVC coming up out of the ground and is spewing
water. I have no idea what caused pressure enough to do that over
the winter as I winterized long before it got cold. Maybe I
should just pay a pro to winterize for now on?



I guess it was a good thing I bought an entire Febco 765-1 last year,
maybe I can use it and salvage the poppett/bonnett I used for
replacement parts last year.

Thursday, April 26th 2007, 5:53am

by Wet_Boots

Now, make it one of those jobs where I have to replace a brass AVB with a PVB, and make up for the mismatch in dimensions, and it might go another hour. Ka-ching! I think if I were in the foothills, with all of the freezeups, I'd go back to using union fittings on PVB installs.

Thursday, April 26th 2007, 3:31am

by SprinklerGuy

Getting close to that myself...but at 185 I'm still making 115-120 bucks in 1/2 to 45 minutes....I wish I could do them all day!

Tuesday, April 24th 2007, 12:40pm

by Wet_Boots

With the latest price increases, I'll be charging over $200 to replace a PVB.

Tuesday, April 24th 2007, 8:58am

by SprinklerGuy

I buy poppet bonnet kits for less than 35 dollars...and the entire assembly is 65ish...makes no sense for me to buy the entire units....

As for the consumer pricing...I have no doubt that you pay the same...and I'm glad you got it up and running..

FWIW....I would have charged you about 125 to replace poppet / bonnet and about 185 to replace the entire unit...