I bet the other threads that are leaking are NPT threads. Its commn and other manufacturers have adapaters, such as anti syphon and hole adapter, filte etc to be hose threads and or pipe threads. All the washers and thread sealant tape in the world is not gonna make a hose thread adapt to a pipe thread.....then again you say its a Horrible Fright kit, so with that in mind most any kind of thread is possible from that company. As cheap as drip irrigation systems are, why did you choose HF for a source when prices are reasonable and cheap at major home building supply stores and online. There are perhaps 6 or
8 companies and if you do your homework, and read their online manuals as to what fittings are and how they are sized, its a simple matter to assemble drip irrigation and have it work..........all without leaks. Visit my website:
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expressed are those of my wife, I had no input whatsoever. Remove "nospam" from email addy.