
Plain tap water considering the number of times it has leaked out into my bag over the years,

Is a rothenberger one, to be used for natural gas.Depends what gauge you're using. The Regin Premier gauge requires the Premier fluid to work properly
I use a Testo 510i
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local