DIY ballast questions

I'm putting together my ballast system and need to go from the brass ball valve off the thru hull to the home depot 1" plumbing fittings. The galv fittings thread in to the brass OK but doesn't seat to the bottom, however it does get tight just not a ton of penetration into the brass. Also in hooking up the hose to a T for instance can I just push the hose over a 3/4" nipple off the T, hose clamp it and call it good? or do I need more of a barbed hose fitting to connect the hose to the plumbing/bags?

Thanks, been getting a ton of help already from Wakemakers, big props to Jason....

I believe what is happening is that you are putting together a standard pipe thread onto an NPT. They are slightly different threads, thus they don't mesh together perfectly.

How deep are you getting it? I have heard folks who have had no problem doing this, and I've seen others that have. I'd water test it, or get a valve that matches the threading.

As for putting the hose on - I did the same thing you are doing - putting the 1" over the standard thread, not the barbs. Many of the fittings don't come in barbs. I've had no leaking at all doing this. I'm sure it isn't the best practice, but I've done this on at least a dozen different attachments and it has worked just fine.