Smith-Blair Style 313 Service Saddle - Double Bale, Galvanized, 1-1/4-18 in
Smith-Blair Style 317 Service Saddle - Double Strap, 304 SS, 4-24 in
Smith-Blair Style 313 Service Saddle - Double Bale, Galvanized, 1-1/4-18 in
Smith-Blair Style 317 Service Saddle - Double Strap, 304 SS, 4-24 in

Smith-Blair Style 317 Ductile Iron Service Saddle - Double 304 SS Straps, 4-24 in

Nominal Size - OD Range: 4 in - 4.40-4.50 in OD
Tap Size: 5/8 in CC
Part No.: 317-00045005-000

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$202.68
SKU: 317-00045005-000
Weight : 7.0 lb
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Description
Smith-Blair · Service Saddle
Style 317 Service Saddle
Double Strap, Ductile Iron Body, TaperSeal Gasket and Two Wraparound 304 Stainless Straps — 4-24 in
300 PSI Max Working Pressure
-20°F to +180°F Temperature
Nitrile (Buna-N) TaperSeal Gasket
Epoxy-Coated Ductile Iron Body
Double 304 Stainless Straps
5/8 to 4 in CC and NPT Taps
NSF/ANSI 61 and 372
AWWA C800
4.40-25.80 in Pipe OD
7-30 lb Weight
Description

The Smith-Blair Style 317 is a double-strap ductile iron service saddle for tapping branch connections on new or existing water mains, with outlets from 5/8 in CC up to 4 in NPT. The wide wraparound body carries a TaperSeal Nitrile gasket fully bonded in its cavity, and two Type 304 stainless steel straps with welded studs hold it to the pipe and add corrosion resistance.

The body is designed with PVC and other soft or brittle pipe in mind: the wide straps spread the load so tightening does not damage the pipe, and a closed lug on one side acts as a hinge for easier installation. On 16-24 in sizes the body takes ductile iron spherical washers that seat the strap nuts and align the straps. It also serves for air/vacuum valves, pitot tubes, drain valves and other service equipment.

Application: service taps and branch outlets of 5/8 to 4 in on 4-24 in water mains, including HDPE with spring washers.

Key Features

  • Working pressure up to 300 PSI, depending on size and application
  • Large outlets: 3 in and 4 in NPT on selected 6-18 in sizes
  • TaperSeal hydro-mechanical lip holds higher pressure with minimal nut torque
  • Two wide straps spread the load to protect PVC, HDPE and other non-rigid pipe
  • Meets applicable AWWA C800; certified to NSF/ANSI 61 and NSF/ANSI 372
What Ships and What It Needs to Run

Included: the epoxy-coated ductile iron body with the TaperSeal gasket in place, two 304 stainless straps with welded studs, fluoropolymer-coated stainless nuts and stainless flat washers (plus ductile iron spherical washers on 16-24 in).

Spring washers on HDPE, ordered separately: Smith-Blair spring washers p/n 150115-002 are required on HDPE, DR17 or thicker, 4-16 in nominal; ask us to quote them with the saddle.

Genuine Smith-Blair equipment, factory-new in original packaging — sold and supported by Watermain Supply, an independent industrial supplier.
12-Month Smith-Blair Warranty

Smith-Blair warrants its products to be free of defects in materials and workmanship for one year from the date of shipment by Smith-Blair. Dated proof of purchase, such as a bill of sale, is required to establish eligibility. Smith-Blair will repair or, at its option, replace a defective product; the product is returned to the factory or warehouse Smith-Blair designates.

Working Pressure

Up to 300 PSI. depending on size and application. Smith-Blair notes the allowable pressure depends on the type of pipe, pipe diameter, service conditions and installation workmanship.

Materials Specifications
Body Ductile iron 65-45-12 per ASTM A536; wraparound design, wide skirt and heavy tapping boss
Straps Type 304 stainless steel, double strap: 14 GA x 1.50 in strip (ASTM A240) on 4-16 in; 0.25 x 1.25 in flat bar (ASTM A276) on 18-24 in
Nuts Type 304 stainless steel GR 8 per ASTM A194, 5/8-11 UNC heavy hex, fluoropolymer coated to prevent galling
Washers Type 304 stainless steel per ASTM A240, 5/8 in Type A plain
Studs Type 304 stainless steel per ASTM A276, 5/8-11 UNC rolled threads welded to the strap; 6.00 in long on 4-6 in, 7.00 in on 8-14 in
Spherical washers (16-24 in) Ductile iron 65-45-12 per ASTM A536, Flexi-Coat epoxy; full bearing for the strap nuts
Gasket Nitrile (Buna-N) per ASTM D2000, TaperSeal lip, cemented in the cavity; resists water, oil, natural gas, acids, alkalies and most aliphatic hydrocarbons; -20°F to +180°F
Finish Flexi-Coat fusion-bonded epoxy per AWWA C213
Welds GMAW by qualified welders, passivated to keep corrosion resistance

Materials subject to change by the manufacturer.

Pipe Applications

Steel, ductile iron, cast iron, asbestos cement, PVC and HDPE DR17 or thicker with spring washers; the spec adds stainless steel and aluminum. On PVC, Smith-Blair limits use to steel-OD PVC of DR26 or thicker (4.50-12.75 in OD) and cast/ductile iron OD C900 PVC, Class 150 (DR18) or better; on HDPE to 4-16 in nominal, DR17 or thicker.

Sizes
21 sizes from 4.40 to 25.80 in OD — open for the full list
Nominal size - pipe OD NPT taps CC taps
4 in - 4.40-4.50 in 3/4, 1, 1-1/4, 1-1/2, 2, 2-1/2 in 5/8, 3/4, 1, 1-1/4, 1-1/2, 2 in
4 in - 4.40-4.80 in 3/4, 1, 1-1/4, 1-1/2, 2, 2-1/2 in 5/8, 3/4, 1, 1-1/4, 1-1/2, 2 in
4-5 in - 4.74-5.14 in 3/4, 1, 1-1/4, 1-1/2, 2, 2-1/2 in 5/8, 3/4, 1, 1-1/4, 1-1/2, 2 in
4-5 in - 5.00-5.63 in 3/4, 1, 1-1/4, 1-1/2, 2, 2-1/2 in 5/8, 3/4, 1, 1-1/4, 1-1/2, 2 in
6 in - 5.94-6.70 in 3/4, 1, 1-1/4, 1-1/2, 2, 2-1/2 in 5/8, 3/4, 1, 1-1/4, 1-1/2, 2 in
6 in - 5.94-6.90 in 3/4, 1, 1-1/4, 1-1/2, 2, 2-1/2, 3 in 5/8, 3/4, 1, 1-1/4, 1-1/2, 2 in
6 in - 6.84-7.60 in 3/4, 1, 1-1/4, 1-1/2, 2, 2-1/2, 3, 4 in 5/8, 3/4, 1, 1-1/4, 1-1/2, 2 in
6-8 in - 7.69-8.72 in 3/4, 1, 1-1/4, 1-1/2, 2 in 5/8, 3/4, 1, 1-1/4, 1-1/2 in
6-8 in - 7.69-9.05 in 3/4, 1, 1-1/4, 1-1/2, 2 in 5/8, 3/4, 1, 1-1/4, 1-1/2, 2 in
8-10 in - 8.54-10.10 in 3/4, 1, 1-1/4, 1-1/2, 2, 2-1/2, 3, 4 in 5/8, 3/4, 1, 1-1/4, 1-1/2, 2 in
10-12 in - 10.64-12.12 in 3/4, 1, 1-1/4, 1-1/2, 2, 2-1/2, 3, 4 in 5/8, 3/4, 1, 1-1/4, 1-1/2, 2 in
10 in - 10.75-11.10 in 3/4, 1, 1-1/4, 1-1/2, 2, 2-1/2 in 5/8, 3/4, 1, 1-1/4, 1-1/2, 2 in
12-14 in - 12.62-14.32 in 3/4, 1, 1-1/4, 1-1/2, 2, 2-1/2, 3, 4 in 5/8, 3/4, 1, 1-1/4, 1-1/2, 2 in
12 in - 12.75-13.20 in 3/4, 1, 1-1/4, 1-1/2, 2, 2-1/2 in 5/8, 3/4, 1, 1-1/4, 1-1/2, 2 in
12-14 in - 13.40-14.32 in 3/4, 1, 1-1/4, 1-1/2, 2, 2-1/2 in 5/8, 3/4, 1, 1-1/4, 1-1/2, 2 in
14-16 in - 15.95-17.25 in 3/4, 1, 1-1/4, 1-1/2, 2, 2-1/2 in 5/8, 3/4, 1, 1-1/4, 1-1/2, 2 in
16 in - 17.25-17.80 in 3/4, 1, 1-1/4, 1-1/2, 2, 2-1/2, 3, 4 in 5/8, 3/4, 1, 1-1/4, 1-1/2, 2 in
16-18 in - 17.40-18.88 in 3/4, 1, 1-1/4, 1-1/2, 2, 2-1/2, 3, 4 in 5/8, 3/4, 1, 1-1/4, 1-1/2, 2 in
18 in - 19.50 in 3/4, 1, 1-1/4, 1-1/2, 2, 2-1/2 in 5/8, 3/4, 1, 1-1/4, 1-1/2, 2 in
20 in - 21.60 in 3/4, 1, 1-1/4, 1-1/2, 2, 2-1/2 in 5/8, 3/4, 1, 1-1/4, 1-1/2, 2 in
24 in - 25.80 in 3/4, 1, 1-1/4, 1-1/2, 2, 2-1/2 in 5/8, 3/4, 1, 1-1/4, 1-1/2, 2 in

Choose the size and pipe OD in the first option and the tap in the second; the part number shows in the last option.

3 in and 4 in NPT Outlets
Nominal size Pipe OD Outlets
6 in 6.63-6.96 in 3 in NPT
6 in 6.84-7.60 in 3 and 4 in NPT
8-10 in 8.54-10.10 in 3 and 4 in NPT
10-12 in 11.30-12.12 in 3 and 4 in NPT
12-14 in 13.40-14.32 in 3 and 4 in NPT
16 in 17.25-17.80 in 3 and 4 in NPT
16-18 in 17.81-18.88 in 3 and 4 in NPT

From the Smith-Blair 2025 price book p.88-94. Outlets of 5/8 to 2 in CC and 3/4 to 2-1/2 in NPT cover the full 4-24 in range; the picker shows each available combination.

Installation Notes
  • Confirm the saddle type, tap size and pipe OD range match the job, then clean the pipe where the gasket will seat, removing scale, dirt and debris.
  • Check the gasket is seated in the body; lubricate the pipe and gasket with a soap-and-water solution (anti-freeze may be required) that meets the water and pipe supplier's requirements.
  • Mount the body as close to the final tap position as possible and check its orientation before tightening: moving or rolling the body on the pipe can damage the gasket.
  • Tighten the nuts progressively and evenly to the torque in the instructions, keeping the stud lengths on both sides equal; do not over-torque. The saddle seals the tap and is not designed to give structural rigidity to connections or equipment, so support those separately.
  • On HDPE, fit Smith-Blair Belleville spring washers p/n 150115-002 under the nuts without removing the flat washers; other spring washers may cause failure.
  • Plastic pipe limits: steel-OD PVC 4.50-12.75 in of DR26 or thicker; cast/ductile iron OD C900 PVC Class 150 (DR18) or better; HDPE 4-16 in, DR17 or thicker. Not for fiberglass-reinforced or plastic irrigation pipe. Make the outlet connection with a lubricating, sealing thread compound, never tape.

From Smith-Blair Installation Instructions TI-010 (Rev 08/26/21), in the Data Sheet tab.

Before You OrderAll Smith-Blair products are Made to Order and Non-Returnable.
Items typically shipped in 5 - 10 business days.
316 stainless strap assemblies, Viton, EPDM or other gaskets, BSP threads, 1/2 in taps, anode connectors and 1-1/4 to 3 in body sizes are built to order — email sales@watermainsupply.com with the pipe OD, pipe material and tap size.
For engineering-led sizing and selection support or a factory submittal, email sales@watermainsupply.com or call 1-888.510.4036.
© Watermain Supply — A division of E4 Industrial LLC
Data Sheet
Style 317 Installation Instructions Style 317 Spec Sheet Style 317 Datasheet
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