Leaky pipe fittings


  #1  
Old 04-25-21, 03:28 PM
W
Member
Thread Starter
Join Date: Mar 2006
Location: United States
Posts: 123
Upvotes: 0
Received 1 Upvote on 1 Post
Leaky pipe fittings

Two issues that are driving me crazy:

No. 1: I screw on a fitting (such as the brass hose bib shown in the photo) and it doesn't align properly. It won't go another 1/2 turn, and if I back it off, it leaks. How to solve this problem?

No. 2: In the picture, the pvc section will feed into the sprinkler system. Im using (threaded) to PVC adapter screwed into brass T. No matter what I do, it leaks! Whats the trick to stop the leak?



 

Top Answer

 
04-25-21, 03:35 PM
XSleeper's Avatar
XSleeper
XSleeper is offline
Group Moderator
Join Date: Dec 2004
Posts: 26,223
Received 1,714 Upvotes on 1,538 Posts
1). Use TFE paste instead of Teflon tape.

2). If you are on any municipal water system, thats an illegal hose fitting and an illegal way to hook up a sprinkler. The hose bib needs a backflow preventer and the sprinkler system needs a vacuum breaker.
 
  #2  
Old 04-25-21, 03:35 PM
XSleeper's Avatar
Group Moderator
Join Date: Dec 2004
Posts: 26,223
Received 1,714 Upvotes on 1,538 Posts
1). Use TFE paste instead of Teflon tape.

2). If you are on any municipal water system, thats an illegal hose fitting and an illegal way to hook up a sprinkler. The hose bib needs a backflow preventer and the sprinkler system needs a vacuum breaker.
 
CasualJoe, I Mullins, joecaption voted this post useful.
  #3  
Old 04-25-21, 03:59 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Jersey
Posts: 62,067
Received 3,422 Upvotes on 3,068 Posts
Use tape first and then paste.
 
  #4  
Old 04-25-21, 04:00 PM
W
Member
Thread Starter
Join Date: Mar 2006
Location: United States
Posts: 123
Upvotes: 0
Received 1 Upvote on 1 Post
1. How will the TFE paste allow for further tightening?

2. I'm using this for the sprinklers: Orbit 3-Valve Inline Manifold Assembly-57253 - The Home Depot. It's actually a replacement for the anti-siphon valves that have been there the last 30 years. Same with the hose bib. I've never seen a 'backflow preventer'. My house has 3 hose bibs.
 
  #5  
Old 04-25-21, 04:50 PM
XSleeper's Avatar
Group Moderator
Join Date: Dec 2004
Posts: 26,223
Received 1,714 Upvotes on 1,538 Posts
It will allow less tightening without leaking.
 
  #6  
Old 04-26-21, 05:05 AM
I
Member
Join Date: Feb 2021
Posts: 168
Received 35 Upvotes on 29 Posts
"I'm using this for the sprinklers: Orbit 3-Valve Inline Manifold Assembly-57253 - The Home Depot. It's actually a replacement for the anti-siphon valves that have been there the last 30 years."

No, it's not. Just look at the instructions that come with that manifold - an anti syphon/anti-backflow device is required. Fortunately, they sell one for about $12.
 
  #7  
Old 04-27-21, 02:06 PM
W
Member
Thread Starter
Join Date: Mar 2006
Location: United States
Posts: 123
Upvotes: 0
Received 1 Upvote on 1 Post
"No, it's not. Just look at the instructions that come with that manifold - an anti syphon/anti-backflow device is required. Fortunately, they sell one for about $12."

Neither the instructions that came with this manifold/valve unit nor any of the YouTube videos regarding installation of this manifold say anything about installing an additional backflow device. Can you provide a link with the instructions you're talking about? And a part no. or link for the part you're describing?

As I scour the internet for further details, I've not been able to find any sites that give details on installing an anti siphon device with an in-line manifold valve system. And don't know how to check if it's even required in California (San Diego). I did learn that sprinkler valves with built in anti siphon prevention may fail and are not testable, so you never even know if it's working properly.

I'm interested in finding out more about the $12 item you referred to, where to get it, and how to install it. Thank you.
 

Last edited by walks; 04-27-21 at 02:35 PM.
  #8  
Old 04-28-21, 10:01 AM
Z
Forum Topic Moderator
Join Date: Sep 2005
Location: USA
Posts: 5,831
Received 367 Upvotes on 327 Posts
Most areas now require PVB (Pressure Vacuum Breaker) devices to be installed on all sprinkler systems. Like this:
https://www.lowes.com/pd/Watts-Bronz...reaker/3135149

They aren't cheap, but they prevent any of the possibly contaminated water from the sprinkler system (including fertilizer, pest control, etc) from backflowing into the home's water supply.

For outside spigots, something like this is required.
https://www.lowes.com/pd/AMERICAN-VA...reaker/3353894
Some outdoor faucets like frost-free faucets have them built in.
 
  #9  
Old 04-28-21, 11:04 AM
W
Member
Thread Starter
Join Date: Mar 2006
Location: United States
Posts: 123
Upvotes: 0
Received 1 Upvote on 1 Post
I really don't want to spend $105! It's only a small patch of lawn I'm watering. Will this work?
Orbit Brass FNPT 3/4-in Atmospheric Vacuum Breaker in the Backflow Preventers & Vacuum Breakers department at Lowes.com
 
  #10  
Old 05-22-21, 10:47 AM
W
Member
Thread Starter
Join Date: Mar 2006
Location: United States
Posts: 123
Upvotes: 0
Received 1 Upvote on 1 Post
Finished project.
 
XSleeper voted this post useful.
  #11  
Old 05-22-21, 11:07 AM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Jersey
Posts: 62,067
Received 3,422 Upvotes on 3,068 Posts
A nice clean installation there.
 
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: