Danny and Joel, thank you. Danny, that Whale SuperSub looks pretty perfect. I think I'm going to go for the switched one: http://www.amazon.com/Whale-SS5012-Supersub-Bilge-Pump/dp/B003E21IAM/ref=pd_sim_sbs_200_4?ie=UTF8&dpID=41ExLs7vjeL&dpSrc=sims&preST=_AC_UL160_SR160%2C160_&refRID=040MZH4KWCA66H7G4RA8
Joel, there's a dual Y check valve I found on Amazon that I think addresses your concern: http://www.amazon.com/SeaSense-Dual-Bilge-Y-Valve/dp/B00EFXYNV0/ref=pd_bxgy_200_img_2?ie=UTF8&refRID=136WMF8F1DTS722ZGADX Thanks again guys. Ryan
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