Groco & Buck Algonquin Flange Valve backing plate and bronze bolts
Specifications
| Return Shipping Will Be Paid By | Seller |
| All Returns Accepted | Returns Accepted |
| Item Must Be Returned Within | 30 Days |
| Refund Will Be Given As | Money Back |
| Brand | MeriMarine |
| System Of Measurement | Inch |
| MPN | Does Not Apply |
| Material | Fiberglass |
| Country/Region Of Manufacture | United States |
| Finish | sanded |
We will refund any extra shipping fees the day of shipping if ordering different sizes separately but shipped together. We are manufacturing in house with a cnc router machine 1/2 inch thick fiberglass seacock backing plates. For use with both Groco and Buck Algonquin Flange Valve line and thru hulls. Forespar Marelon valves require different backing plates which we can make. These are produced from Extren 525 which is water proof, fire proof, mass produced polyester fiberglass sheet with a 30 thousand PSI compression and tensile strength. Epoxy, polyester and vinylester resins and 5200 - not recommended will bond to it. The seacocks and through hulls can be purchased from West Marine and Defender.com and many others. These have the same bolt patterns as the Groco BB1, BB2 and BB3 backing plates without the inserts as they are drilled and tapped. The inside diameter of the hole is specific for each thru hull size but by having 6 bolt holes and not 3 you can use the 1" for the 0.75" thru hull and the 1.5" for the 1.25" thru hulls if needed. We believe that Groco backing plates are made from injection molded pvc which does not bond well with epoxy and also they use brass, not bronze inserts which can corrode. Our prices are typically close to 1/2 the price of Groco backing plates as we only sell direct. We suggest using Silicon Bronze bolts. Our listing option is for 5/16-18 x 1" long. THESE BOLTS ARE NOT INCLUDED IN THE COST OF THE BACKING PLATE. THEY MUST BE PURCHASED SEPARATELY. PRICE IS FOR EACH BOLT AND YOU WILL NEED THREE PER BACKING PLATE. Just install the valve with bronze bolts directly to the backing plate. After adjusting valve to desired position and cutting off any of the bolts if they protrude through the backing plate insert the thru hull a couple of threads. Smear some thickened epoxy between hull and plate and tighten the thru hull. This prevents any epoxy getting into the fitting. Thickened epoxy will also fill any slight hull curvature. Install as a dry fit first. If the backing plate needs to be sanded to fit the curvature of the hull, orientate the valve correctly first and mark off the correct section to sand with very course sand paper or file. A belt sander works well. Product Name Our Price Fits Seacock Sizes OD (in) ID (in) Bolt Circle (in) Threads BP-0.75 $30.00 0.750” 4.3 1.05” for 3/4" NPS external thread 3.12 / 3.38 5/16"-18 BP-1.00 $30.00 1.00” 4.3 1.3" for 1" NPS external thread 3.12 / 3.38 5/16"-18 BP-1.25 $30.00 1.250” 5.4 1.65” for 1.25" NPS external thread 3.62 / 4.5 5/16"-18 BP-1.50 $30.00 1.50” 5.4 1.9" for 1.5" NPS external thread 3.62 / 4.5 5/16"-18 BP-2.0”$50.002.0”7.0”2.5” for 2” NPS external thread53/8” - 16