Winterizing using air compressor

I bought a small air compressor for winterization as I plan on periodically using the water in my pod this winter when the weather permits.  Is it necessary to bypass the hot water heater when blowing out the water lines?  I have a 190 and the access to the pump and tank are not that easy.  I assume I can just force air (at 30psi) through both the hot and cold lines without bypassing, but maybe I am missing something.

I have used air for 5 years, I never bypass my water heater, I do however, drain and clean. The only reason to bypass water heater is if injecting anti freeze, you don't want to fill water heater with 6 gals of anti freeze. The lines will blow fine with air.

Thanks Mcarter

So here is what I did; I opened up both low point drains and the fresh water tank, depressurized the HW tank and removed the anode, after all of the water was drained I hooked up air compressor to blow out plug at 30psi, then opened each valve one at a time until only air came out.

Originally posted by mcarter I have used air for 5 years, I never bypass my water heater, I do however, drain and clean. The only reason to bypass water heater is if injecting anti freeze, you don't want to fill water heater with 6 gals of anti freeze. The lines will blow fine with air.