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

Water outage boil water notice Stella Drive

01/14/2026

Crews are repairing a leaking flush valve on Stella Ln. Residents of Stella Ln. will experience little to no water pressure during these repairs. Residents of Stella Ln will need to boil water after repairs until further notice.

Boil Water Notice for Community Public Water Systems

1/14/2026

Due to Water pressure Loss the Texas Commission on Environmental Quality has required Walnut Creek SUD PWS#Tx1840008 a public water system to notify all customers on Stella LN toboil their water prior to consumption (e.g., washing hands/face, brushing teeth, drinking, etc). Children, seniors, and persons with weakened immune systems are particularly vulnerable to harmful bacteria, and all customers should follow these directions).

To ensure destruction of all harmful bacteria and other microbes, water for drinking, cooking, and ice making should be boiled and cooled prior to use for drinking water or human consumption purposes. The water should be brought to a vigorous rolling boil and then boiled for two minutes.

In lieu of boiling, individuals may purchase bottled water or obtain water from some other suitable source for drinking water or human consumption purposes.

When it is no longer necessary to boil the water, the public water system officials will notify customers that the water is safe for drinking water or human consumption purposes.

Once the boil water notice is no longer in effect, the public water system will issue a notice to customers that rescinds the boil water notice in a manner similar to this notice.

Please share this information with all the other people who drink this water, especially those who may not have received this notice directly (for example, people in apartments, nursing homes, schools, and businesses). You can do this by posting this notice in a public place or distributing copies by hand or mail.

If you have questions concerning this matter, you may contact James Blackwood or Perryb Day at 817 220 7707 or at the Walnut Creek SUD offices located at 1155 W HWY 199 Springtown TX 76082

Boil Water Notification Rescinded

01/09/2026

The boil water notice issued on January 5th for the water main break at the intersection of County Road 4898 & County Road 4797 has been rescinded.

BWN Rescinded - County Road 4898 effected streets 4797, 4790, 4795, &4796

Boil Water Notification Rescinded

01/08/2026

The Boil Water Notices issued on January 5th, have been rescinded.

BWN Rescinded - CR 3561 - For the following road County Roads 3655, 3561

BWN Rescinded - Odell Rd - For the following roads Odell Rd, Maudy Ln

Stage 1 Water Restrictions

10/27/2025

Stage 1 Water Restrictions

Limit landscape watering with sprinklers or irrigation system at each service address to twice per week.
- Designated watering days will be as follows:
  - Addresses with even numbers - Monday and Wednesday mornings: Midnight ro 10 am, evenings: 6pm to Midnight
  - Addresses with odd numbers - Tuesday and Thursday mornings: Midnight to 10 am, evenings: 6pm to Midnight