Thermal Expansion

What is Thermal Expansion?

Thermal expansion is a result of heating water. When water is heated, its density decreases and its volume increases. Backflow prevention assemblies and other one-way valves installed at a customer's service connection eliminate a path for expanded water to flow back to the distribution system, resulting in increased system pressure. This increase in pressure can result in: pressure surges, dripping faucets, chronic or continuous dripping of temperature and pressure-relief valves on hot-water heating tanks, and other mechanical problems with hot-water tanks, including distortion and rupture.

What is a closed system?

A closed system is created when an approved backflow prevention assembly or a single check valve (not approved for backflow prevention) is installed at a customer's service connection. The backflow prevention assembly or single check valve does not allow water to flow backwards from the customer's private water system into the PWS's distribution system.

example for system designs

example

Emergency Water Main Repair

12/07/2023

There is an 8" water main break on E hwy 199; crews are on site working on isolating the damaged section of water main.

Once isolated the section of E Hwy 199 only the North side from the east end on Monticello Dr to Jaybird Ln will have low pressure while repairs are being made.

Emergency water repair

12/06/2023

A contractor has hit a line on Wet Rock Rd E in Boyd. A crew is on site for repairs. The estimated time to repair is 2 - 3 hours.

There is a Boil water Notice issued for this leak for copies please follow the link: BWN - Wet Rock Rd

Stage 3 Water Restrictions In Effect

08/07/2023

Please note: as of August 7th, 2023 Walnut Creek SUD is now in Stage 3 watering restrictions.

Stage 3 is being implemented due to the following factors listed below:

1. To conserve water: engage conservation efforts, before lake levels reach a critical point.

2. To maintain adequate supply for essential needs of ALL Customers. (While in the prior Stage 2 watering restrictions, attempts were made to establish odd and even watering days, however, water was being used faster than it could be supplied to outer areas of the system). System infrastructure improvements are in the construction process to assit with this issue.

3. To ensure adequate supply of water to all areas for fire protection.

4. To preserve the life of WCSUD equipment and to prevent mechanical breakdown that could lead to water outages.

Actions Available Under Stage 3, Water Emergency

The General Manager may order the implementation of any of the actions listed below, as deemed necessary. Measures imposing mandatory requirements on customers require notification to TCEQ. WCSUD must notify TCEQ within five business days if any mandatory measures are implemented.

Continue or initiate any actions available under Stages 1 and 2.
Require customers (including indirect customers) to initiate Stage 3 in their drought contingency plans. Indirect customers include any wholesale customer of WCSUD's primary wholesale customers.

All Water Users

Prohibit all landscape watering, including parks, golf courses and sports fields.

Exceptions:

Foundations may be watered for up to two hours on any day by hand-held hose; or using a soaker hose or drip system placed within 24-inches of the foundation that does not produce a spray of water above the ground.
Trees may be watered for up to two hours on any day by hand-held hose, drip irrigation or a soaker hose. Tree watering is limited to an area not to exceed the drip line of a tree.
Prohibit establishment of new landscaping.
Vehicle washing restricted to commercial car wash or commercial service station and can only be done as necessary for health, sanitation, or safety reasons, including but not limited to, the washing of garbage trucks and vehicles used to transport food and other perishables. All other vehicle washing is prohibited.
Prohibit the operation of ornamental fountains or ponds that use potable water except where necessary to support aquatic life.
Prohibit the draining, filling, or refilling of swimming pools, wading pools and Jacuzzi type pools. Existing private and public pools may add water to maintain pool levels; however, they may not be refilled using automatic fill valves.

Thank you for your cooperation,

James Blackwood

General Manager

Walnut Creek SUD