Can i use the outside threads of a 1.5in bulkhead?

StirCrazy · #1 05-10-2010, 08:30 PM

the threads on a bulkhead are strait threads so the other piece will go on and off easy, pipe threads are tapered so they tighten as they thread on. two different threads which are not compatable. you might be able to get it on a couple threads and it may not leak, but it will be a very weak union which will pull out very easy with a bit of bumping.

Steve

Milad · #2 05-10-2010, 10:26 PM

Quote:

Originally Posted by StirCrazy

the threads on a bulkhead are strait threads so the other piece will go on and off easy, pipe threads are tapered so they tighten as they thread on. two different threads which are not compatable. you might be able to get it on a couple threads and it may not leak, but it will be a very weak union which will pull out very easy with a bit of bumping.

Steve

so what you are saying is I should throw a slip in and cement it?

#3 05-10-2010, 11:53 PM

Yup that is what he is saying NST and pipe thread do not mix in any direction umfortunitly, you can get them to start but that is about all.

Bill

StirCrazy · #4 05-11-2010, 02:32 PM

Quote:

Originally Posted by Milad

so what you are saying is I should throw a slip in and cement it?

yupers. if you are dead set on having threaded, you could use a F slip to M thread bushing to give you a proper threadded end, but threads are also more likly to drip than slip also. so I will always recomend slip and throw in the odd union to take it apart if you need to.

Steve

Milad · #5 05-11-2010, 05:29 PM

Quote:

Originally Posted by StirCrazy

yupers. if you are dead set on having threaded, you could use a F slip to M thread bushing to give you a proper threadded end, but threads are also more likly to drip than slip also. so I will always recomend slip and throw in the odd union to take it apart if you need to.

Steve

thats basically what im going to do. Going to have a couple unions and the rest slip.