Fitting taper thread steel pipes

[Gyn_Paul]

It's been quite a while (think B&W, and trams, steam trains, strawberries which didn't taste of balsa wood etc.) since I last fitted steel water pipes, and now have to connect 2" and 1-1/2" ones to a central heating system.

I *think* last time I used just Boss White, or Boss White + hemp, but I'm not certain.

In these enlightened times what would you clever fellows suggest? They've got to be 5-bar water-tight as I don't fancy filling and draining 3000 L

Would the threads be too coarse for PTFE tape?

[Théière]

New kid on the block, well new to you B&W, tram users

Loctite 55, Pipe sealing chord, you may even get a free sample if you register.

http://www.loctite.co.uk/cps/rde/xchg/henkel_uke/hs.xsl/thread-sealing-4477.htm

http://www.loctite.co.uk/cps/rde/xchg/henkel_uke/hs.xsl/loctite-4087.htm?iname=Loctite+55&countryCode=uke&BU=industrial&parentredDotUID=productfinder&redDotUID=1000000IX1M