Glen~

Just to be clear…There are 3 ways you could go with water flow…

• Single 1000 pump to all three units and the PR3X-3 relay…Single 1″ thru-hull…
• Individual pumps (one for each unit) 500 for the 16K and two 250's (one for each 6K) Three 3/4″ thru hulls & related strainers
• Individual pump, thru hull (3/4″) & strainer for the 16K (500 GPH) Then a 500 GPH pump for the Two 6K units, a PR3X-2 and One centrally located 3/4″ thru hull & strainer.

If you go with the single 1000 GPH…The manifold feed line needs to be no bigger than 3/4″…If you want to call me I can explain how I would build the manifold….It would be easier on the phone…

If you go with a single 500 GPH for the 2 aft units…That manifold feed line is 5/8″

With the Gen/inverter into the mix you will need to consider that you will also need to power the pump relay breaker (if installed) in your main panel…How that is done is up to you & your guys down in the BVI…But I thought I would mention it.

The 16 should start just fine on a Honda 3K, and might even start fine on the 2.5K inverter.

As far as reliability of the Cruisair pump relay…It's very reliable…And it's parts have been standard production for as long as I can remember…

As opposed to Marine Air's relay box (several models) that requires a complete board replacement…Each & every part of the Cruisair box is individually replaceable and can be carried as spares for not much money….Triggers, which are the most common failure in both boxes are $29 each from Cruisair for instance…With Marine Air that would require a complete board replacement.

Failure of a trigger would just mean that one unit would not start the pump…Until the trigger is replaced…The Cruisair box can also be "jumped" in a matter of seconds to get the pump to run 24/7 (shut off pump with breaker) until service can be applied…

When I service one…I usually leave the jumper I make up for the customer inside the box so it is always there if needed, It's just a matter of plugging it in, and a screwdriver is only needed to remove the cover of the box.

Steve~