Dont know if this will help anyone but here are the specs on two different pumps from their web sites:
http://www.marchpump.com/series-809/
March 809-PL
Max Flow 4.5 GPM
Max Head 4.3 FT
Power 0.01 HP
Electrical 115V 50/60HZ or 230V 50/60HZ
Plastic Housing
Submersible No
http://www.chuggerpumps.com/product.php?prodid=99
Chugger Model : SS INLINE BREWING PUMP
Max Flow 7 GPM 22.7 LPM
Max Head 18.6 FT 4.1 M
Power .04 HP .029 KW
Electrical 115V 50/60HZ
SS Housing
Non-Submersible
60HZ 50HZ
fwiw, I've added the pumps I use for comparison...
http://www.marchpump.com/815-pl-beer//
March 815-PL
Max Flow 7 GPM 22.7 LPM
Max Head 18.6 FT 4.1 M
Power .04 HP .029 KW
Electrical 115V 50/60HZ
Submersible: Non-Submersible
60HZ 50HZ
Cheers!