Description
Overview:
This Plug Screw is a direct replacement for the service port on Stihl WP 300 and WP 600 water pumps. It seals the threaded opening on the pump housing to maintain suction and prevent leaks during priming and normal operation. As a Genuine OEM replacement part, referenced by Stihl number VB03 708 5800, it matches the original fit and thread form for reliable sealing. The plug installs into the pump body and works with the existing sealing interface, which may use an O-ring or washer depending on the pump revision. Correct fit is important to avoid air ingress, reduced flow, or loss of prime. Suitable for routine maintenance or repair where the original plug has been lost, damaged, or stripped.
Key Features:
- Genuine OEM Stihl replacement part
- OEM reference: VB03 708 5800
- Fits Stihl WP 300 water pump
- Fits Stihl WP 600 water pump
- Threaded plug for pump service port sealing
- Maintains prime by preventing air ingress
- Supports correct operating pressure and flow
- Matches original thread form and seating depth
- Designed for direct, like-for-like replacement
- Installs with standard hand tools
- Suitable for routine service and repair use
- Check and renew the O-ring or washer if required
Typical Applications:
Used on Stihl WP series centrifugal water pumps to seal the threaded service port on the housing. Helps retain water for priming and prevents leakage during transfer or dewatering tasks on sites, gardens, farms, and general maintenance work.
Also known as:
Priming plug, drain plug, pump housing plug screw, service port plug, bleed plug, water pump plug.
Fits Models:
WP 300, WP 600
Alternate Part Numbers:
VB03 708 5800, VB03-708-5800, VB037085800
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