Gas Shut Off Valve testing

[rivcokid]

Hi all - I had to replace the gas shut off valve due to it not shutting off and leaking gas through the carb. Anyway, the tank is totally empty now. I'm wondering if it would be safe to test my connections with 3 - 4 gallons of water in the gas tank first to make sure there are no leaks before I fill the tank with gas (at $4.30/gallon). I wouldn't leave it in for long, would drain it thoroughly and dry it before I'd revert to gas. I just don't want gas leaks in the cabin.

Thanks!