Attwood Primer Bulb 5/16" Inner Diameter Hose

Attwood multi-layer primer bulbs are designed to provide up to 60% more priming output than the competition while exceeding EPA and CARB requirements for fuel evaporation.

Our exclusive three-layer design resists collapsing and hardening and ensures high output in temperatures ranging from 18F to 122F.

Includes high-efficiency check valves.

5/16 I.D. Hose

Exclusive three-layer construction prevents collapse under vacuum
and ballooning/bursting under pressure
Low-permeation material prevents fuel evaporation

60% more output per pump than leading competitors

Exclusive high-efficiency check-valves for faster priming and
low fuel restriction (less than 1kpa restriction at 50 liters/hour)

Engineered hose barbs and stainless steel stepless clamps for leak-free performance

Compatible with Ethanol blended fuels

EPA and CARB certified