Skip to the content
Wunder-Bar Bargun M4 Stem Seal O-Ring Installation Tool
$782
Wunder-Bar Bargun M4 Stem Seal O-Ring Installation Tool
Wunder-Bar Bargun M4 Stem Seal O-Ring Installation Tool
In stock
$782
30-day returns · Easy with prepaid labels provided
Get it by 3–5 business days
Free shipping · Change ZIP
As soon as tomorrow. Choose Next Day during checkout.
- Compatibility: Wunder-Bar M4 Series Manifolds.
- Function: Sanitary O-ring removal and installation.
- Type: Precision Service Tool.
- Benefit: Prevents manifold damage during rebuilds.
?
Need a hand?
Bilingual support from real techs · Mon–Fri 8:30–5 CT
Request a quote
Need a custom build, freight order, or just want pricing in writing before you order? Quotes back within 24 hours.
The Wunder-Bar M4 Stem Seal Tool is a specialized service instrument designed for the repair of commercial bar guns. This tool allows for the precision removal and installation of the tiny O-rings and stem seals inside the M4 manifold. Using the correct tool prevents damage to the delicate plastic manifold walls and ensures that seals are seated perfectly for a drip-free operation. A must-have for draught technicians and bar managers performing gun rebuilds.
Technician's Note: Manually prying seals with a screwdriver can scratch the manifold bore, leading to permanent leaks. This tool is designed to distribute pressure evenly. Always lubricate new seals with food-grade O-ring grease (Petrol-Gel) before using the tool to seat them, ensuring a smooth fit and a long service life.