Watts Spools User Manual

For Retrofit Applications

ES-Spools/Flanges

Job Name

Job Location

Engineer

Approval

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LEAD FREE

Contractor

Approval

Contractor’s P.O. No.

Representative

Series W-SPL and W-FLG

Make Up Spools and Flanges

For Backflow Preventers 21⁄2"-10" (65-250mm)

Watts “Make Up” Spools are used when retrofitting a backflow preventer into an installation where an existing backflow preventer is being replaced. Watts “Make Up” Flanges are used in piping applications where there is a need for additional fitting lay length. The W-SPL and W-FLG feature Lead Free* construction to comply with Lead Free* installation requirements.

Models

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Spools

W-SPL - Make Up Spools

Available in Lightweight 300 series Stainless Steel or Epoxy coated Carbon Steel. AWWA 150# class “D” Carbon Steel Flanges offered as standard. 150# class “D” Stainless Steel Flanges upon special request.

W-FLG - Make Up Flanges

AWWA 150# modified class “D” Zinc plated Carbon Steel Flanges with standard bolt pattern. 150# modified class “D” Zinc Plated Carbon Steel Flanges with standard pattern slotted. 150# modified class “D” Stainless Steel Flanges with standard bolt pattern.

Contact factory for specific applications.

Watts 709/LF709

Spool

Watts 774 with Spool

*The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight.

Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements, please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials without prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.

How to order

Locate the manufacturer and model number under the valve size column in the matrix on these two pages. It is assumed that the valve you will be installing is a Watts 774 Sentry Series. On the first line across from the model number is the lay length of the valve less gates. On the lines listed below is the valve being replaced. On that line is the lay length of that valve. The column to the right is the length of the spool needed to “make up” the difference between the valve being replaced and the lay length of the “Sentry Series.” Below the spool length is the ordering code for that spool.

Retrofit Spool Pieces for Various Lengths • Cast Iron Watts Products vs Watts Sentry Series

WATTS ACTUAL SPOOL ACTUAL SPOOL ACTUAL SPOOL ACTUAL SPOOL ACTUAL SPOOL ACTUAL SPOOL MODEL 2

774 22" - 22" - 22" - 27 709/LF709 24" 17⁄8" 24" 17⁄8" 34" 117⁄8" 421⁄2" 147⁄8" 52" 223⁄8" 64" 343⁄8" 774DCDA 22" - 22" - 22" - 271⁄2" - 291⁄2" - 291⁄2" 709DCDA - - 24" 17⁄8" 34" 117⁄8" 411⁄2" 137⁄8" 52" 223⁄8" 64" 343⁄8" 994 22" - 22" - 22" - 271⁄2" - 291⁄2" - 291⁄2" 909/LF909 261⁄8" 4" 261⁄8" 4" 37" 147⁄8" 441⁄2" 167⁄8" 551⁄4" 255⁄8" 673⁄8" 373⁄4" 994RPDA 22" - 22" - 22" - 271⁄2" - - - - 909RPDA 261⁄8" 4" 261⁄8" 4" 37" 147⁄8" 441⁄2" 167⁄8" 551⁄4" - 673⁄8" -

†Size and length of valve being replaced.

For Example: when replacing a Watts 4" 709 with a Watts 4" 774 you would need a spool that is 11 The slight decrease in the spools length is to accommodate the flange gasket, approximately

Example:

WATTS MODEL: 709 WATTS MODEL: 774

Line Size Lay Length: Line Size Lay Length: 4" 34" 4" 22"

Spool Length from chart: 11

⁄2"† LENGTH NEEDED 3"† LENGTH NEEDED 4"† LENGTH NEEDED 6"† LENGTH NEEDED 8"† LENGTH NEEDED 10"† LENGTH NEEDED

⁄8" Subtract Lengths: 12" Ordering code: 0107020

⁄2" - 291⁄2" - 291⁄2" -

⁄8".

⁄8" long.

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