Forespar 253 Series Marelon Mushroom Head Thru-Hull Fitting

Features:

• Forespar Marelon® mushroom head thru-hull with hose barb connection
• Suitable for use 6" or more above the waterline
  • Less than 6" requires a seacock
• Marelon fittings are popular with many top quality boat builders worldwide
• Marelon® is a proprietary formulation of polymer composite compounds using composite reinforced polymer and additives to produce a superior marine-grade product
  • Designed for use above and below the waterline
  • Complete freedom from corrosion
  • High strength
  • UV Stabilized
  • Will not freeze or become brittle with age or temperature extremes
  • U.L. and A.B.Y.C. approved
  • Marelon fittings can be installed using the same techniques and materials as bronze fittings

Minimum Physical Properties Required for Approval are:

• Tensile Strength: 10,900 PSI / 75 mPa
• Flexural Modulus: 500,000 PSI / 3480 mPa

Note:

• Forespar threaded plumbing fittings, like most true marine plumbing fittings, use NPSM threads (National Standard Free-Fitting Straight Mechanical Pipe Thread). NPT (National Pipe Threads) are tapered, NPSM Threads are parallel. The two types are not designed to work together.
• Value by test to ASTM D638 (American Society of Testing & Materials)
• Value by test to ASTM D790 (American Society of Testing & Materials)

Dimensions Diagram

Marelon Data Sheet