Great advice given here and at the risk of repeating what some have already said, I would strongly suggest the following:
Replace original drain hose with new, smooth bore bilge hose.
Pump ratings are at zero head, so be familiar with the net output capability/capacity (after installing and routing drain hose) and size pump(s) accordingly.
Double hose clamp each end of the hose.
Install second bilge pump on opposite side of hull for visual reference.
Install the second (backup) bilge pump 1"-2" above the primary bilge pump to avoid running the backup unnecessarily. This can be done by shaping a piece of pressure treat 2"x6" board to suit the deadrise if needed. The board should be level and can be secured with 3M 5200 marine adhesive. Let the primary pump handle the casual water and draw less on your battery.
Have an idiot light on the dash, along with the remote auto/manual/on switch, to establish a visual indication when the back-up pump is running.
Route the drain lines of each bilge pump so that there is an upward loop of about a foot (or whatever you can get) before it comes back down to the thru-hull and keep the thru-hull fitting well above the waterline. This loop will prevent any intake of water from outside the hull when listing, waves, or from a beam sea.
If you have cheap plastic thru-hull fittings, replace them with good quality fittings.
Use tinned electrical marine wire throughout for much longer life and reliability.
Wire pump directly to battery to always have pumping capability on board, especially if you moor or slip your boat. Do not wire with other wiring in a way that you can turn off power to the pumps.
Enough said. Hope this helps. This is a project you will enjoy. Good luck!
2001 Seaswirl Striper 1851 DC 115 HP Ficht
[This message was edited by Nauti Buoy on 01-02-03 at 09:34 AM.]
[This message was edited by Nauti Buoy on 01-02-03 at 09:36 AM.]