911, 911S Combination Fill Valve and Backflow Preventer
Series 911, 911S Combination Fill Valve and Backflow Preventers are for use in commercial and residential hydronic heating systems to provide make-up water to the boiler, and prevent backflow when supply pressure falls below system pressure. It consists of a brass Watts Model 9D backflow preventer and a bronze Watts Model 1156F feed water pressure regulator in one pre-assembled unit. Model 911 has union NPT x NPT connections. Model 911S has union solder x NPT connections. The Series 911, 911S has a high capacity fill valve that provides quick system filling and purging. It is designed for use in the boiler feed lines of hydronic heating systems.
Additional Information
Ask a Question
** Territory restrictions apply for most products.
Technical Data
Warning: Undefined variable $fp_cert_nfpa20 in /home/bbcpump/www/www/wp-content/themes/bbc-pump/templates/product-valve.php on line 201
Available Materials:
Warning: Undefined variable $val_mat_sep in /home/bbcpump/www/www/wp-content/themes/bbc-pump/templates/product-valve.php on line 229
Cast Iron
Pressure Rating:
to 100 psi
Available Sizes:
Warning: Undefined variable $val_size_sep in /home/bbcpump/www/www/wp-content/themes/bbc-pump/templates/product-valve.php on line 365
1/2in
Connection Types:
Warning: Undefined variable $ct_sep in /home/bbcpump/www/www/wp-content/themes/bbc-pump/templates/product-valve.php on line 379
Solder, Threaded
Thread Types:
Warning: Undefined variable $tt_sep in /home/bbcpump/www/www/wp-content/themes/bbc-pump/templates/product-valve.php on line 388
NPT
See product datasheet for additional details