Hello... New person here.

We just had a well issue and had to replace our pump. While cleaning around the base of my 350 gal tank I discovered a leak. I finally found a replacement used tank because I couldn't afford a new one, and brought it home.

The seller did a leak test with air and we were satisfied enough to take the chance, because one of the three ports was damaged.We cleaned all of the ports with a die but I'm not sure.

It looks to me like we have three, maybe four "good" threads and the others are kind of iffy. I've watched videos where a person used lambert, a cotton string before he put the blue industrial grade sealant onto the threads. Another video said to put the sealant on the female threads then put teflon tape then another layer of sealant then put more on the male threads.I can't find this "lambert" product in any of three stores I checked, but I do have cotton string.

Obviously I don't want to plumb the whole tank and find out I have a leak. You guys know about everything, so what is your best advice? Should I forget about the string and just use the teflon tape with the sealant? I have another waterproof product, epoxy, and should I use a bit of it toward the outside threads?

Thank you for reading my post and for your expertise and replies.

I think you are looking for something like this.



wrap it into each thread starting from the end.

a good quality pipe dope over it and even dope the female threads.

you don't need to connect the pipes to test the joint.

put all the plugs in but one. attach an air compressor and pressurize it to 100 psi.

just google 'plumbing sealing cord' to search for this or other similar producte.

Thank you very much for your reply.

I did see that product at Home Depot yesterday where I bought True-Blu pipe thread sealant. That product looked too thick, and not like the cotton product I saw on the videos so I didn't get it. However, now I have a few days to make a decision and I think I will go get that product and follow your suggestion. I went to three stores and no one had heard of lambert so I assumed it was something probably used back in the 40s. I couldn't find any old plumber guys to give advice.

I've examined the damaged threads and there are a couple on the inside that are going to need this extra sealant.

I had not thought of using a compressor to test the pressure.That is an excellent idea. If I can figure out how to put the air in. I did go fish the old air release valve out of the trash so maybe I can use that someway.

Thanks again for your help.