[hoskm01]

1.5" female outlet out the top of a lake pump. Mounted tight, plumbed tight., taped heavily. Why does the nipple go loose every now and again? Note the dirty spray on the elbow from the gap. Sch80 nipp.

 

[Mike Leary]

Pros use brass. :hammerhead::hammerhead::hammerhead:
Nice teflon tape display, too.

 

[Wet_Boots]

Or galvanized, depending. I don't want plastic threaded into a pump.

 

[hoskm01]

Pros use brass. :hammerhead::hammerhead::hammerhead:
Nice teflon tape display, too.

I just showed up, I didnt give birth to the thing.

 

[michigander]

Are you sure the nipple didn't distort from the heat of a zone not turning on? Are all zones working OK?

 

[hoskm01]

From that elbow down the line, everything is golden. Compared it to a new one and caliper is identical, not distorted. Tape appeared to have been doing the work for a while.

 

[Mike Leary]

I just showed up, I didnt give birth to the thing.

Well, you better tell us these things, we always blame the sprinkler guy. I'd say heat and/or vibration, go brass, my son.

 

[hoskm01]

Well, you better tell us these things, we always blame the sprinkler guy. I'd say heat and/or vibration, go brass, my son.

Sold. More metal the better.

 

[Waterit]

And use paste instead of tape.

 

[hoskm01]

And use paste instead of tape.

I like paste!

 

[The Urban Farmer]

Teflon tape is a thread lubricant, not sealant. Using the sch 80 nipple will work fine as long as you apply pipe sealant when you replace it. If you are getting enough vibratioin to have a fitting come loose it's time to do some pump maintenance.

 

[FIMCO-MEISTER]

Teflon tape is a thread lubricant, not sealant. Using the sch 80 nipple will work fine as long as you apply pipe sealant when you replace it. If you are getting enough vibratioin to have a fitting come loose it's time to do some pump maintenance.

Welcome to the site UF. Describe pump maintenance for me. Thanks.

 

[AI Inc]

And use paste instead of tape.

I like to use both.

 

[bicmudpuppy]

Welcome to the site UF. Describe pump maintenance for me. Thanks.

He is suggesting that the vibration may be from worn seals/bearings, out of balance impeller, etc. It may be time to re-build the pump in the near future. Some guys are good enough to do motor maintenance/re-building too. I never have been. If the motor/motor winding is bad, I call for a new motor and scrap the old one at the salvage yard. On that note, motor windings are a real good source of cash as copper scrap.

 

[Flow Control]

I just showed up, I didnt give birth to the thing.

:laugh::laugh::laugh::laugh: