Balboa 40mm On/Off 100% Shut-Off Swim Spa Waterfall Valve – 18-4038COALG

Product Description

Maintain complete control over your swim spa or hot tub water features with the Balboa 18-4038COALG 40mm Posi-Seal On/Off Valve. Designed for spa waterfalls, plumbing isolation, and maintenance applications, this premium Balboa valve delivers a 100% positive shut-off seal, allowing water flow to be completely stopped when required. 

Featuring a robust 1.5" (40mm) dual-port design, this valve is ideal for controlling waterfall circuits or isolating pumps, heaters, and other plumbing components without draining the entire spa system. The clear valve body makes inspection easy, while the stainless-steel cap and charcoal crescent handle provide long-lasting durability in demanding spa environments. 

Commonly found in Signature Spas and compatible with many Balboa/HydroAir plumbing systems, the 18-4038COALG is a reliable OEM replacement part trusted by spa technicians and service professionals. 

Key Features

• Genuine Balboa Water Group replacement valve
• Part Number: 18-4038COALG
• 40mm (1.5") dual-port valve design
• 100% Posi-Seal shut-off capability
• Ideal for swim spa waterfalls and plumbing isolation
• Clear serviceable body for easy inspection
• Durable charcoal crescent handle
• Stainless steel cap construction
• Suitable for maintenance, repairs, and component isolation
• Commonly used on Signature Spas and other Balboa-equipped spas 

Technical Specifications