# US 2019/0169869 A1 · Polyvinyl chloride conduit for backwashing pool filters > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0169869 A1 - Document ID: US20190169869A1 - Status: Published application - Kind: A1 - Application number: 15/830,705 - Filed: 2017-12-04 - Published: 2019-06-06 - Earliest claimed: 2017-12-04 - Inventors: Montasser M. Elsawi - Web page: https://patentgrep.com/patent/US20190169869A1 ## CPC - E04H 4/1218: {Devices for removal of polluted water; Circumferential gutters} - B01D 37/00: Processes of filtration (processes specially adapted for filtering gases B01D46/00) - C02F 1/001: {Processes for the treatment of water whereby the filtration technique is of importance (C02F1/44 takes precedence; construction of filters in general B01D24/00 - B01D41/00)} - B01D 29/68: with backwash arms, shoes or nozzles - C02F 2103/42: from bathing facilities, e.g. swimming pools - C02F 2303/16: Regeneration of sorbents, filters - E04H: BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL (foundations E02D) - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes) ## Abstract In one embodiment, a pool filter backwash assembly is described that comprises a pool filter extension configured to be connected to a backwash outlet of a pool filter and a backwash shower head configured to convert a backwash stream from the backwash outlet to a spray directed away from the pool filter. In some embodiments, the pool filter backwash assembly further comprises a backwash shower extension and an angled adapter. In addition, a method of backwashing a pool filter is described in which a pool filter backwash assembly is attached to a backwash outlet of a pool filter. ## Claims ### Claim 1 A pool filter backwash assembly comprising a pool filter extension configured to be connected to a backwash outlet of a pool filter and a backwash shower head configured to convert a backwash stream from the backwash outlet to a spray directed away from the pool filter. ### Claim 2 (depends on 1) The pool filter backwash assembly of claim 1, wherein the pool filter extension comprises a filter extender having a first end attached to a pool filter connector sized for the backwash outlet. ### Claim 3 (depends on 2) The pool filter backwash assembly of claim 2, wherein the filter extender has a second end attached to the backwash shower head. ### Claim 4 (depends on 1) The pool filter backwash assembly of claim 1 further comprising a backwash shower extension and an angled adapter. ### Claim 5 (depends on 4) The pool filter backwash assembly of claim 4, wherein the pool filter extension comprises a filter extender having a first end attached to a pool filter connector sized for the backwash outlet and a second end attached to the angled adapter. ### Claim 6 (depends on 4) The pool filter backwash assembly of claim 4, wherein the backwash shower extension comprises a shower extender having a first end attached to the backwash shower head and a second end attached to the angled adapter. ### Claim 7 (depends on 5) The pool filter backwash assembly of claim 5, wherein the angled adapter is rotatably attached to the filter extender. ### Claim 8 (depends on 6) The pool filter backwash assembly of claim 6, wherein the shower extender is rotatably attached to the angled adapter. ### Claim 9 (depends on 1) The pool filter backwash assembly of claim 1, wherein the backwash shower head is rotatable. ### Claim 10 (depends on 3) The pool filter backwash assembly of claim 3, wherein the backwash shower head is rotatably attached to the filter extender. ### Claim 11 (depends on 6) The pool filter backwash assembly of claim 6, wherein the backwash shower head is rotatably attached to the shower extender. ### Claim 12 (depends on 2) The pool filter backwash assembly of claim 2, wherein the filter extender has a periscoping length. ### Claim 13 (depends on 6) The pool filter backwash assembly of claim 6, wherein the shower extender has a periscoping length. ### Claim 14 (depends on 4) The pool filter backwash assembly of claim 4, wherein the angled adaptor has an angle of from about 45° to about 135°. ### Claim 15 (depends on 4) The pool filter backwash assembly of claim 4, wherein the angled adaptor has an adjustable angle. ### Claim 16 (depends on 4) The pool filter backwash assembly of claim 4, wherein the shower head further comprises a grating. ### Claim 17 (depends on 4) The pool filter backwash assembly of claim 4, wherein the spray is directed away from the pool filter at an angle of from about 10° to about 80° from horizontal. ### Claim 18 (depends on 6) The pool filter backwash assembly of claim 6, wherein the backwash shower head comprises a conduit end having a circular cross-sectional shape with a diameter sized to attach to the shower extender and a diffuser end configured to form the spray. ### Claim 19 (depends on 18) The pool filter backwash assembly of claim 18, wherein the diffuser end has a substantially elliptical cross-sectional shape with a first diameter greater than the diameter of the conduit end of the diffuser and a second diameter, perpendicular to the first diameter, less than the diameter of the conduit end of the diffuser. ### Claim 20 A method of backwashing a pool filter comprising: i) attaching a pool filter backwash assembly to a backwash outlet of a pool filter, the pool filter backwash assembly comprising a pool filter extension comprising a filter extender having a first end attached to a pool filter connector sized for the backwash outlet, and a second end attached to an angled adapter and a backwash shower extension comprising a shower extender having a first end attached to a backwash shower head and a second end attached to the angled adapter; ii) forming a backwash stream from the backwash outlet of the pool filter; and iii) converting, by the backwash shower head, the backwash stream to a spray directed away from the pool filter.