Thread: How to connect air hose to pressure pot

Welcome to the Forum. Australia as a location doesn't help us guide you. Most hydraulic hose supply places will have the adaptors you require, Pirtek etc.
Rgds,
Crocy.

Don't use an adapter / connector between the two types of fittings - it will be just another air leak under pressure.Any decent hardware store will be able to sell you the correct Nitto fitting to go onto your pressure vessel inlet - simply unscrew the existing NPT fitting and replace it with a Nitto male fitting. Make sure to use a good quality thread sealer when you fit the new connector (I find that a good thread sealing paste works better than plumber's tape in this application).

+1 on replacing the existing fitting with a Nitto fitting. A plastic spray bottle with water and drop of dish washing detergent can be used to spray onto any joints to check for leaks. Alternately dab teh water on with a small paintbrush.

You can generally buy generic Asian Nitto style fittings at hardware and auto parts stores. I have found that the bundles of fittings in a card and blister pack mate the couplers with the opposite gender from the pack with a decent seal, but often have a minor leak when mated with other brand compatible couplers. This suggests that there is a degree of variance in the dimensions and tolerances that various manufacturers achieve on their production lines. If you can access a store specialising in air line or hydraulic hose and fittings, you can generally obtain matched couplers from them, and they tend to source from a common supplier, so this can help eliminate leaky couplings.

Can you show a pic of the outlet fitting on the hose so we can establish how it is fitted, some are crimped directly to the hose, and some have a barb to male thread fitting crimped to the hose, and a female thread / female hose coupler screwed to the male thread. I prefer the later because if I have issues with the couplers sealing, I can replace both coupler fittings with a matching pair with a decent seal. It also allows me to use different style couplers on hoses purchased at the same time. I do this to separate totally dry lines from pre oiled (air tool) lines, eliminating the possibility of introducing oil into hoses and devices that require pure dry air, like sprayers and air blast units, or machines that use automated compressed air for cycling through different processes.

Much depends where you live and having just been through a very similar exercise in Sydney. The predominant hardware is Bunnings and for pipe fitting they are useless, you will need to find an old school hardware or a plumbing supply outlet but pick the plumbing mob carefully as many now only deal in plastic.

NPT and BSW pipe fittings have different TPI or threads per inch. If you're really stuck you can use together with a heap of thread tape or sealant. The trouble is adapters NPT to BSW in most retail outlets are not that common and its going to be a challenge. These sort of fitting these days are in the realm of engineering projects and not your usual daily plumbing or DIY projects.

The 10mm x 10mm is really the old BSP converted to metric, yeah I know thats BS, but thats they way they do it.

But Google is your friend so try mail order its probably the easiest way especially if you're in the country or dont have a an engineering supply outfit handy

https://www.ebay.com.au/sch/i.html?_...BoCyrMQAvD_BwE

BSP to NPT Stainless Steel M&F Adaptor

BSP NPT USGT Adaptors

Adaptor NPT x BSP | Fittings Express

Most fittings available off the shelf in Aus are BSPT, but more specialist hardware and tool suppliers can get them in NPT.

THIS looks like the part you want