

Ships same day if ordered by 12 pm
Manufacturer pricing rules prevent us from advertising our discount — no account or email required to see it.
Secure Payments
Easy Returns
Expert Advice
Fast Shipping
The Xylem-McDonnell & Miller 551-S-HD Mechanical Head is a vital component for boiler water level control. Designed specifically for McDonnell & Miller model 136 boilers, this mechanical head ensures precise and reliable operation. Made from cast iron and featuring a 1/8 NPT female connection, it offers durability and ease of installation.
The 551-S-HD Mechanical Head is essential for maintaining optimal boiler performance. It replaces the 551-S Head Mech. #136600, providing reliability and functionality.
Thanks for subscribing!
This email has been registered!