[Public-List] Bilge pump question

[The Rochets]

I am planning to install an electrical bilge pump to supplement the  
manual Whale Gusher 10 that came with the boat.

I do not like holes in the hull (even above the waterline) and I am  
wondering if there is any safe way to connect the electrical pump's  
outlet hose to the manual pump's outlet hose (just above its thru- 
hull), so I can get by with the existing thru-hull?

Thank you for any suggestions.

Bernard Rochet
Sunswept 608