Customer
Service
Tankless Water Heater
Isolation Valves
Matsui USA Service Site
Buy Online
Buy new or replacement parts directly from Matsui USA on our eBay store. We offer complete isolation valves kits as well as related valve parts and accessories. Payments are processed securely through the eBay platform.
For installation help, see our Product Care section.
Warranty Info
Read our policy outline and frequently asked questions regarding the limited lifetime warranty policy for Matsui USA products.
Care & Maintenance
Proper care and maintenance of your Matsui USA products ensures optimal performance and longevity. Learn more about how to use our valves in accordance with the production specifications and warranty terms.
Inquiry Form
If, upon review of our warranty policy, and you either believe you are still covered by the warranty or are interested in out-of-warranty service options, please fill out the service inquiry form below. We will respond as soon as possible.
Alternately, you can contact matsui.usa.inc@gmail.com with direct service inquiries.
Alternately, you can contact matsui.usa.inc@gmail.com with direct service inquiries.