Design and Construction Standards - Tualatin Valley Water District

Water Service Connections Section 66.3 Constructiona. Installation of Service Connections1. Trench excavation and backfill shall conform to Chapter 2. Cover over pipe shall beas indicated on Standard Detail 10.2. Service Saddlesi. Thoroughly clean the pipe surface and apply a suitable gasket lubricant perthe manufacturer’s instructions.ii. Position the saddle body over the pipe, install the straps, install the nuts tofinger tight, and check to ensure that the gasket is seated flat onto the pipeface.Iii. Tighten the nuts evenly in 20 pound increments to the manufacturer’srecommended torque specifications.3. Copper Tubing Installationi. Copper tubing shall be cut with square ends, reamed, cleaned, and madeup tightly.ii. Install copper tubing in full length segment without joints where possible.Where joints are required, use approved compression fittings.iii. Care shall be taken to prevent the tube from kinking or buckling on shortradius bends. Kinked or buckled sections of copper tube shall be cut andthe tube spliced with the proper brass fittings at the Contractor's expense.4. Meter Box Installationi. Meters and meter boxes shall be installed as shown in Standard Details 7,7D, 7P, 7PD, and 9 or as directed.ii. Finish grade of completed meter enclosure shall allow a minimum of oneinch and a maximum of four inches clearance from the top of the meter tothe meter box.iii. Meter boxes shall be set or constructed plumb, with the top set horizontally.Grade adjustments of the meter boxes shall be by using standard extensionsections for the box specified.iv. Lightly compacted earth backfill shall be placed inside of the meter boxesto depth indicated. Backfill around meter boxes as specified for adjoiningpipe. Provide adequate space to allow for sidewalk installation.5. Meter Installationi. Installation of meters will be withheld until the District has accepted theproject.ii. Prior to connection of the meter, the angle valve shall be opened and theservice line flushed of all foreign materials.iii. Depending on the elevation difference between the meter and theproposed building to be served, the District may require a gate valve orbackflow prevention device on the customer side of the meter at the meterbox.TVWD Water System Standards June 2012 Page 6-4