I am going to be working with black iron NPT pipe when installing a boiler (all water connections) next weekend and will have about 10 connections in all, and I just know something will go wrong leak-wise.
I've read the sticky at the top of this forum several times and anything else I can find both here and elsewhere. I've read an engineer report that only pipe dope should be used on NPT and only on the male side, others say to use both teflon tape and pipe dope. Still others mention thread.
I have rarely worked with black pipe and it scares me. I wish I could do this all in copper.. Is pipe dope just a lubricant or is it also a seal? I have a fairly fresh can of Rectorseal 5 ready to go.
If using teflon tape, how many turns and I assume the dope goes over the teflon, yes? Any advice for someone not really experienced with black pipe appreciated. Thanks.
John
I've read the sticky at the top of this forum several times and anything else I can find both here and elsewhere. I've read an engineer report that only pipe dope should be used on NPT and only on the male side, others say to use both teflon tape and pipe dope. Still others mention thread.
I have rarely worked with black pipe and it scares me. I wish I could do this all in copper.. Is pipe dope just a lubricant or is it also a seal? I have a fairly fresh can of Rectorseal 5 ready to go.
If using teflon tape, how many turns and I assume the dope goes over the teflon, yes? Any advice for someone not really experienced with black pipe appreciated. Thanks.
John
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