• Forespar MF 843 Vented Loop - 5/8"
1 1

Forespar Performance Products

Forespar MF 843 Vented Loop - 5/8"

Forespar MF 843 Vented Loop - 5/8"

OM-FORESPARPERF-MF843VENTED-903003

$38.61
$45.95 $38.61
Sale
FREE Standard Shipping On every U.S. order — no minimum. Faster delivery options are available at checkout for qualifying orders.

Low stock: 1 left
Free standard shipping · every U.S. order, no minimum
Sourced from authorized U.S. distributors
Genuine product · full manufacturer warranty
Secure checkout via Shopify Payments
View full details

Overview

Vented LoopsType

Interrupt unwanted siphoning between tanks with the Forespar MF 843 vented loop. Common applications include marine toilet and engine cooling systems, where its valve admits air when the line is idle and seals as fluid flows through.

Key features

  • An air-admitting valve breaks the siphoning action when the line is not in use.
  • The valve closes during fluid flow to seal the vent.
  • Marelon construction keeps the vent and loop from corroding.
  • A one-way duckbill valve is made to maintain its seal when fluid contains particulate matter.

Specifications

  • Model: MF 843
  • Material: Marelon
  • Valve type: One-way duckbill
  • Barb size: 5/8 inch (15.87 mm)
  • Height: 4-1/2 inches (114.3 mm)
  • Width: 4 inches (101.6 mm)

Specifications

TypeVented Loops
BrandForespar Performance Products
Manufacturer part #903003
UPC028026148742
Boxed dimensions5 x 5 x 2 in
Shipping weight0.15 lb

Shipping & returns

Free standard shipping

Standard shipping is free on every U.S. order — no minimum. Need it faster? Faster delivery options are available at checkout for qualifying orders. In-stock orders ship quickly with tracking; oversized and freight items may ship separately and can take a little longer. International rates are calculated at checkout.

30-day returns

Request a return within 30 days of delivery. Authorized returns are subject to a 15% restocking fee. Return shipping is paid by the buyer; items must be new and in original packaging. See our refund policy.

Genuine products

We source from authorized U.S. distributors. Every product is new, genuine and covered by the manufacturer warranty.

Genuine products

Genuine products, full warranty.

Fast, tracked shipping

On in-stock marine gear.

Expert support

Talk to people who know the gear.

Secure checkout

Protected payments via Shopify.