I have a Sherwood Minimus octo as a backup regulator and its leaking a lot, what should i do besides the shop?

Question

Shop as in taking it to a shop to get fixed

Answer 1

I wouldn't even chance it.  Take it to the shop, and have it adjusted.  Sounds like it needs to be adjusted so the incoming pressure won't open it.

Answer 2

Free flow? In to the shop to have the cracking pressure adjusted or that bit of sand removed from the valve seat.

Leaking as in water leaking in? Have a look at your mouthpiece. That silicone can tear and it's something you can replace yourself in under a minute.