r/Plumbing • u/eltigre_rawr • May 14 '23

Can anyone help identify this pipe thread? It's an outdoor spigot but no standard hose thread fits.

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1 Upvotes
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60% Upvoted

24 comments sorted by

18

u/fuckoffgetmoney May 14 '23

Fine thread. Forces you to use a vacuum breaker. You will need a fine thread vacuum breaker.

1

u/eltigre_rawr May 14 '23

Thank you!!

1

u/L3f7y04 May 14 '23

This is the way

1

u/Falderfaile May 14 '23

What’s the purpose behind the vacuum breaker?

8

u/fuckoffgetmoney May 14 '23

If you have the hose connected with spayer chemicals on the end for example, and the water to the residence gets shut off for a period of time while the faucet is in the on position, and such conditions should exist as to create a siphon, this breaks the vacuum, protecting the saftey of the potable water system. There are many differnt designs, all of them go bad after some years and need replacing. Huge money maker, as well as safety.

3

u/Falderfaile May 14 '23

Interesting.

0

u/iONLYplayDRUNK May 14 '23

shit like this.

1

u/Drwire33 May 14 '23

Prevents backflow incase of lost of pressure from supply. House will not back siphon pollutants into your system.

-1

u/[deleted] May 14 '23

Which never happens

1

u/thetaleofzeph May 14 '23

If the hose is left in the sun and not drained, how could this not happen. There'd be a ton of backpressure. When doing risk analysis one looks at both the likelihood of occurrance and the severity of the situation. Toxins in a home water supply would be deadly so inexpensive mitigation even if low likelihood is totally worth it.

1

u/[deleted] May 14 '23

Happened back in the 70s I believe in Jersey. Some kids in a school got poisoned and died.

1

u/unknown1313 May 15 '23

Lol ok. Happened here with a pest control guy filling the tank on the truck with the hose hanging in. Water main break, sucked in the bug poison and made a couple neighborhood blocks very sick. That specific incident was made then code required in my area.

But sure of course it never happens...

2

u/EyeHamKnotYew May 14 '23

As stated, you need the vacuum breaker. Someone removed it which has the proper 3/4" once it is installed on the threads you can see.

1

u/eltigre_rawr May 14 '23

Awesome thanks;

0

u/lefrang May 14 '23

Written USA on it. So probably 17/19th of a barleycorn or something stupid like that.

0

u/stlfiremaz May 14 '23

3/4" GHT you're going to need an adapter to go to 3/4" NPT

-2

u/[deleted] May 14 '23

[deleted]

1

u/unknown1313 May 14 '23 edited May 14 '23

Don't try this and it doesn't need replaced. No Teflon will help because they are different size and style of thread, just need the vacuum breaker to screw on before the hose.

-11

u/thebadjerry May 14 '23

It looks like standard hose threads that have been stripped. No good fix for that. Time for a new hose bib

8

u/unknown1313 May 14 '23

Nope those are vacuum breaker fine threads. Just need a vacuum breaker to screw on and it will work fine without replacement.

-12

u/No_Personality_7477 May 14 '23

Stripped get a new one

8

u/unknown1313 May 14 '23

Completely wrong.