CS201 Coupling Set & ST201 Spacer Tube Overview and Documents

Roles: Admin, Technician

Last Updated: September 2023

The CS201 Coupling Set can be used along with the ST201 Spacer Tube during initial plumbing installation. When the plumbing has been completed and the lines have been flushed, the Spacer Tube is removed and replaced with the M201 water meter (also compatible with other 7.5" water meters with 1" thread).

CS201 Coupling Set

Standard 3/4" meter coupling
1" NPSM Thread
Maximum 194°F
Maximum 150 PSI
NSF/ANSI 61 & 372 Certified

ST201 Spacer Tube

1" NPSM x 7.5" length
Maximum 194°F
Maximum 150 PSI
NSF/ANSI 61 & 372 Certified

Document Title	Download
Meter Coupling and Spacer Tube Specification Sheet

FAQ

Is the CS201 Coupling required for use with the M201 water meter?

No, it is not required. However, not all 3rd party coupling products are compatible with the M201 meter.

Is a ST201 Spacer Tube required for my property installation?

Use of a spacer tube is strongly recommended for all new plumbing installations. Debris that often gets in the water supply lines during installation can easily become lodged in a water meter's flow chamber, preventing it from incrementing.

Using a spacer tube allows the lines to first be flushed to ensure the water meter works correctly once it has been installed.

Can I use the ST201 Spacer Tube even if I am not going to use the NextCentury water meter?

Yes, the ST201 Spacer Tube works as a temporary spacing tube for standard 7.5" long meters.