PTFE tape or liquid airline sealant or something else

[123hotchef]

I would like the correct fittings but am just unsure what are the correct fittings

 

[Rig Pig]

they are taper! http://www.screwfix.com/p/pcl-airfl...et/4118h#product_additional_details_container

do they sell a BSPP to BSPT adaptor?

You can buy all sorts of adaptors, but it's cheaper and neater to stick to one thread standard

 

[Rig Pig]

123Hotchef, you always move subjects that I'm interested in! I've never had leaky joints and when I assembled my air filter assembly they all leaked!



So which joints can come together? I would have thought that tapered vs parelled is ok as you still have a tapered side which will tighten against the parallel joint.

To ensure a decent pressure tight joint always use the same fitt

The gas PTFE stuff isn't good. When I worked as a plumber, two decades ago, we were told not to use gas PTFE even on gas fittings because it doesn't seal properly. One of the many regulations that we were told to ignore.



I was going to ask this as well, so Loctite 572 is semi-permanent? Will it mean that my valves and garden tap will stop turning around in it's flange if I use 572 instead of PTFE?

123Hotchef, you always move subjects that I'm interested in! I've never had leaky joints and when I assembled my air filter assembly they all leaked!



So which joints can come together? I would have thought that tapered vs parelled is ok as you still have a tapered side which will tighten against the parallel joint.



The gas PTFE stuff isn't good. When I worked as a plumber, two decades ago, we were told not to use gas PTFE even on gas fittings because it doesn't seal properly. One of the many regulations that we were told to ignore.



I was going to ask this as well, so Loctite 572 is semi-permanent? Will it mean that my valves and garden tap will stop turning around in it's flange if I use 572 instead of PTFE?

To ensure a proper pressure tight joint always use the correct fitting, if you need to cross over then use an adaptor, it is possible to screw some fittings into incorrect ports, but if it leaks or blows up and hurts someone or makes a mess you can finish up in a lot of trouble. In the home workshop it's easy to be lazy, I'm as guilty of the rest but on any high pressure system or anything that stores energy I don't cut corners, it's not worth it.
If you need fittings and can't identify them then go to any hydraulic shop and they will help you.

 

[123hotchef]

You can buy all sorts of adaptors, but it's cheaper and neater to stick to one thread standard

just ordered some decent english made ones cheap china aint doing me any favours!

 

[Bill Edwards]

Often I find it easiest to weld fittings together to get the required adaptor. Pop them together in a vice, a quick bead round then you're sorted.
Doesn't really work on malleable iron or brass...

 

[Rig Pig]

Often I find it easiest to weld fittings together to get the required adaptor. Pop them together in a vice, a quick bead round then you're sorted.
Doesn't really work on malleable iron or brass...

Or lead/steel hydraulic fittings!

 

[123hotchef]

could solder them

 

[Bill Edwards]

It might be me but soldering isn't something that is usually quick, easy and to hand. Or any of those things...
Brass isn't so bad actually, it's not really hard to weld together or onto steel with oxy but it's just nowhere near the speed of running round it with a welder, especially MIG. Just getting the gas pressures set probably takes as long as doing it with a MIG.