- Feb 11, 2010
- 149
I'm working out the finishing touches on my plumbing for my OWB and I am stuck at a which pump to use on my main lines. I've determined I need a taco 0013 pump already, so the hard part is figured out. The question is, should I use cast iron or stainless steel? My particular OWB is a semi-closed loop system in that is uses a bladder to keep the net pressure as close to 0 as possible, but no more than a few psi. If it reaches a handful of psi (I'm thinking about 10 IIRC), it vents the pressure off via a relief and then returns to a closed system. Should I use a cast iron pump or a stainless steel pump?
I've found the cast iron 0013's with the IFC for $230/each and a stainless 0013 with the IFC for $465, both of which have free shipping attached to them. I can buy two cast irons for the price of one stainless steel pump, and being the pessimist that I am, I like the idea of keeping an entire spare pump in a box for the day we get 10' of snow and my pump decides to quit working at the same time. But if I'm likely to corrode a cast iron pump in just a year or two, that hardly seems worth it.
I've found the cast iron 0013's with the IFC for $230/each and a stainless 0013 with the IFC for $465, both of which have free shipping attached to them. I can buy two cast irons for the price of one stainless steel pump, and being the pessimist that I am, I like the idea of keeping an entire spare pump in a box for the day we get 10' of snow and my pump decides to quit working at the same time. But if I'm likely to corrode a cast iron pump in just a year or two, that hardly seems worth it.