Hopefully someone can answer my question my first stage regulator doesn’t have a bcd inflator hose low pressure side on it are the inflator hoses a standard size thread that fit into the first stage regulator or does it depend on the make of the first stage regulator. I measured my other set up and the inflator hose on it is 33 inches so I thought I would order the same size for this one as well. I do also require a low pressure plug for one outlet on my first stage that needs to be closed off can someone tell me what side plug I require as well Thank you in advance for any advice you can offer me.
The hose to first stage fittings are pretty standard. Just about any BC inflator hose will fit the LP ports on your 1st stage. More important is whether your BC uses the standard quick disconnect fitting or one of a couple of less standard ones that are out there....need to know what BC you use to advise on that, but 99.9% chance you will need a standard inflator hose with the common standard quick disconnect fitting.
The length of the hose is dependent on a combination of the length of the corrugated hose it attaches to and how you position your cylinder on your BC (high vs low). If 33 inches was a good length for your setup then keep with that length. If 33 inches created a loop of hose above your shoulder then get a slightly short hose, and if 33 inches was not long enough to reach the quick detachable fitting on the corrugated hose then, obviously, you would need a slightly longer hose.
With the exception of a few regulators, such as Mares which uses a 1/2 inch port for their primary 2nd stage port on some of their 1st stages, 99.99% of 1st stage LP ports are 3/8 inch. Most any dive shop will have port plugs available for sale or they may just give one to you. If you don't have dive shop local to you here is a link where you can purchase one/some: Regulator Port Plugs. One can also purchase an inflator hose from that site as well.
-Z