- (a) Filters required. Filtration shall be required for all pools and spas that recirculate water.
- (b) Filters and media. All pool and spa filters and filter media, including alternative filter media, shall be certified, listed, and labeled to NSF/ANSI 50. Filters shall use the appropriate filter media within size specifications as recommended by the filter manufacturer and NSF/ANSI 50.
- (c) Filter design. Filters shall have a flow rating equal to or greater than the design flow rate of the circulation system. Filters shall be designed and installed so that filtration surfaces can be inspected and serviced.
(d) Internal pressure. For pressure-type filters a means shall be provided to allow the release of internal pressure.
- (1) Filters incorporating an automatic means of internal air release as the principal means of air release shall have one or more lids that provide a slow, safe release of pressure as part of the design and shall have a manual air release in addition to an automatic release.
- (2) The following statement shall be posted in letters at least 1/2 inch in height, in a conspicuous location, and within the areas of the air release: "DO NOT START THE SYSTEM AFTER MAINTENANCE WITHOUT FIRST PROPERLY REASSEMBLING THE FILTER AND SEPARATION TANK AND OPENING ALL AIR RELEASE VALVES."
- (3) A separation tank used in conjunction with a filter tank, shall have a manual method of air release or a lid that provides for a slow, safe release of pressure as it is opened.
- (e) Filter and separation tank instructions. Filters and separation tanks for pools and spas shall have operation and maintenance instructions permanently installed on the filter or separation tank.
- (f) Observable waste discharge. Pools and spa filters shall be provided with a readily observable free fall or sight glass installed on the waste discharge line in order that the filter washing progress may be observed. Sight glasses must be readily removable for cleaning.
- (g) Backwashing. Pool and spa filters designed to be backwashed shall be backwashed and maintained according to manufacturer's instructions.
Source Note:The provisions of this §265.191 adopted to be effective January 1, 2021, 45 TexReg 9529.