Forespar Marelon Valves — Selection Guide

Marelon vs PVC and Bronze

• Marelon is a marine-grade polymer composite: it never corrodes like bronze, needs no bonding wires, can be used with any hull material and is immune to lightning damage.
• Marelon products are ABYC compliant and can be used above and below the waterline; over 2400 valve configurations are available (as printed in this guide).
• The comparison chart also covers corrosion immunity, below-waterline suitability, the ABYC 500 lb. strength test, the USCG fire test and crack resistance (shown as tick marks in the PDF).

How to Spec Your Pro Series Part Number

"93" remains constant and indicates a Pro Series valve. Example 931155: base style 1, body style 1, top style 5, 1 1/4" size.

Component Codes

Base (third digit)

• 1 – Flanged seacock base with a mushroom head buttress threaded thru-hull
• 2 – Flanged seacock base with a flush head buttress threaded thru-hull
• 3 – Female NPSM threaded base
• 4 – Straight barbed tailpipe
• 5 – 90 degree elbow barbed tailpipe
• 6 – Flanged seacock base with a screened flush head buttress threaded thru-hull
• 7 – Flanged seacock base with a screened mushroom head buttress threaded thru-hull

Body (fourth digit)

• 1 – Straight flow, single port with a thru-hull plug for use with the buttress thru-hulls
• 2 – Double port "Y" valve, body barb opposite the handle, with a thru-hull plug
• 3 – Straight flow, single port with no thru-hull plug; only a flush cap on the handle
• 4 – Double port "Y" valve, body barb opposite the handle, with a flush cap on the handle
• 5 – Double port "Dual Drain", body barb opposite the handle and a thru-hull plug
• 6 – Double port "Dual Drain", body barb opposite the handle and flush cap handle

Top (fifth digit)

• 3 – Female threads
• 4 – Straight hose barb tailpipe
• 5 – Low profile 90 degree elbow hose barb
• 6 – Blank top only (very few configurations, body 5 & 6 only)
• 7 – Female garden hose fitting (engine flush-out valves only, body #2 & 4; not shown)

Optional Modifier Codes

• N – NPSM straight threaded base for seacock valves, to install on a standard thru-hull. No thru-hull included.
• B – BSP threaded base (1" – 2"). No thru-hull or handle plug.
• C – Chromed mushroom head buttress thread thru-hull.
• L / R – Top elbow faces left / right (looking at the top of the valve with the handle facing down).
• E – Valve to be used with an ROV electric valve (OEM only).
• V – Anti-venturi style thru-hull paired with the valve.
• K – Handle lock-off plate to satisfy USCG requirements, for standard padlocks (1" & 2" sizes only).

Pro Series valves are made in the USA; contact your sales rep for volume quotes.