Little Giant makes a good selection of pumps:
http://www.littlegiant.com/
I use one of their magnetic drive pumps for my outdoor fish pond. It's about 20 years old and still runs great.

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past MB rides:
'68 220D
'68 220D(another one)
'67 230
'84 SD
Current rides:
'06 Lexus RX330
'93 Ford F-250
'96 Corvette
'99 Polaris 700 RMK sled
2011 Polaris Assault
'86 Yamaha TT350(good 'ol thumper)