Hey, We are picking up our 04 Mob LSV in a couple weeks and intend on adding a custom ballast system aft. In our previous boat we really got tired of managing all the gear around the ballast bags. We ordered 2 poly tanks off ebay to fit in the aft lockers that are 48X12X18 and sold as 40 gal ea(about $70ea delivered). should be about 350LB ea. since they are only 12 inches high I intend on putting the stock ballast bag on top of the hard tanks for surfing.Should have @ 1700lbs when finished but as allwaysriden said should only use 1100 when surfing. I hope it fits! I have not figured out the final plumbing plan yet. Plan A is to use 1" fill manifold with lawn sprinkler valves and rule 1100gph fat sac discharge pumps on each tank and sac, might add a additional fill pump if stock pump is not sufficient. Looking for ideas, please pass them on.
Pray for Sun, k-n-c
ps. West Marine has stainless discharge fittings for $15 ea pretty cheap for a nice looking upgrade.