Flow Meter Shark Fitting


#1

I was chatting with my landscaping company and they said they never (and would never) use a shark fitting on the main pipe feeding the sprinkler system. They said the amount of pressure is high and they wouldn’t trust it.

It looks to me like the install instructions are to use shark fittings for the flow meter. What has been people’s experiences with them? Any issues? Are there any alternatives possible if I don’t want to use a shark?


#2

@larrywal - what is the water pressuring in your system? Sharkbite devices are rated up to 200 PSI and the PVC-Lock devices are rated to 150 PSI, with a burst rating of 600 PSI. More than enough strength to handle household water pressures. For the flow meter installation, it has to be on the main line to be able to measure everything. My flow meter has been installed for two months - no issues.

The flow meter is made out of ABS not PVC, so Sharkbite or PVC-Lock devices are the only option as gluing ABS to PVC is not supported via building codes. The only issue that I’ve seen mentioned with the Sharkbite or PVC-Lock devices is if there are water hammer conditions on the line, then the Sharkbite or PVC-Lock device may dig into the pipe more and be harder to remove using the tool. Once installed, I’m not planning on removing the device.


#3

Got it - thanks. How do I easily measure pressure?

The blowout valve is currently installed just before where I will install the flow meter, so I guess it would also have to handle the pressure of a blow out…


#4

@larrywal - Most residential systems will be well below the thresholds. One would use a gauge like this:

https://www.homedepot.com/p/Winters-Instruments-PET-LF-2-5-in-Lead-Free-Brass-Water-Pressure-Test-Gauge-with-3-4-in-Swivel-Hose-and-Maximum-Pointer-and-0-160-psi-kPa-PETM213LF/305046977

And connect it to a faucet closest to the main line. If there is higher pressure, say over 35 PSI, I believe the recommendation is to use pressure regulated heads in the system so the amount of misting is reduced.

I don’t blow out my system so I don’t know the pressures used - but I can’t believe they would be higher than the devices can handle.


#5

My installer used Lasco PVC push fittings. One of them is leaking and now I have to figure out how to remove it all and install the Orbit ones that he should have used in the first place. He did say that I have really high water pressure. I can turn three zones on at the same time with no pressure issues. My installer also was surprised to hear me say it had to be a push fitting instead of glue, but I insisted he follow the directions. And now I’m still dealing with the mess and can’t use my sprinklers until the new fittings arrive in the mail. Nobody has them in stock where I live.


#6

I have used the Lasco “Push Fit” connectors also and they like to leak. They are easy to remove without damaging the WFS.

I use a Tiny Tim saw or you can use a 32 tooth hacksaw blade.
Cut the fitting at a 45 degree angle. Spin it 180 degrees and make one more cut.

Cut only until you hit the small metal band. Pry the fitting open and then the band and the o-ring will come off with ease.

Then go to home depot and get the orbit fitting which has never leaked for me.

If you are connecting copper to the WFS, Shark bite is still the best option.

On another note about the pressure.

Most irrigation runs best at 95 to 100 psi. Larger commercial systems up to 130 psi.
You can install a high range pressure regulator which will allow you to adjust from line pressure down to whatever you feel comfortable running.


#7

I ended up using a dremel and a very steady hand. Got the Lasco fitting off and the orbit on. No more leaks!


#8

Very nice. We love to see a success story. There is a sound reason why Rachio specified the fittings that they did.