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Forespar 903003 Marelon 5/8" Vented Loop Siphon Break Valve

Manufacturer

Forespar

Picture for manufacturer Forespar

Part Number

903003
12 reviews
03/12/2036 12:04 AM
Sale Price

$29.10

4 left at this price

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Usually delivered within 2 days

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Product Details

The Forespar 903003 Marelon Vented Loop is a critical safety component for marine plumbing systems, designed to prevent back-siphoning that could lead to flooding or sinking. This 5/8" vented loop features a float-operated valve that allows air to enter the discharge line when water flow stops, effectively breaking the siphon and preventing seawater from flowing back into the vessel.

Key Features:

  • Constructed from glass-reinforced Marelon composite for superior corrosion resistance and durability
  • 5/8" hose barb connections for secure fitting integration
  • Float-activated valve automatically opens to admit air when needed
  • Install above the waterline to prevent backflow in marine toilet, sink, and other discharge systems
  • Non-metallic construction eliminates electrolysis and corrosion issues
  • Translucent body allows visual inspection of valve operation

Marelon vented loops are essential for any below-waterline discharge system including marine heads, galley sinks, and livewell drains. The valve must be installed at least 6-12 inches above the waterline to function properly. Regular inspection and cleaning ensures reliable operation and protection against dangerous back-siphoning.

Products specifications

Compatibility

In-Line

Diameter

For 5/8" Line

Material

Marelon

Type

Vented Loop

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Very simple

really nice pic great price's just a great sight very happy

So far so good

Good

Easy shopping

Fantastic price, positive communication, arrived before promised worked out great!

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was fast

Cheaper price than the competitors and free shipping. It's pure win.

Great service

Great communication, lowest price I could find anywhere, and quick shipping with a tracking number. What more could you ask for. 2nd time dealing with them and still impressed! order# 6935

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