A liquid transfer device having a housing with a top end, a bottom end, a sidewall, and an inner cavity. The sidewall has an inner surface and an outer surface. There is a plurality of openings traversing said sidewall. Also present is a filtering surface that covers the openings. The water or other liquids are pumped or transferred with a pump contained inside the inner cavity, with a fluid exit used for carrying the water out towards exterior hosing.

A rod having a substantially-cylindrical shape with both ends being covered is provided to a lid body, which covers an upper end surface of a case having a bottomed substantially-cylindrical shape, the rod protruding in the case. A first hole is formed in a portion of a side surface of the rod, which is exposed to the inside of the case. Further, an air vent pit (passage) is formed in the lid body, and a second hole is formed in a portion of the side surface of the rod, which is exposed to the inside of the air vent pit. A moving member moves along the rod from a first position at which the moving member does not cover the first hole and a second position at which the moving member covers the first hole.

The invention relates to a filter insert for insertion into a filter housing of a fluid filter, comprising a filter material, which is designed to be flowed through by a fluid to be filtered during operation of the fluid filter from a raw side to a pure side of the fluid filter, and to a floatable radio module, which is designed to float on a water quantity located in a water collection area of the fluid filter during operation of the fluid filter.

A filter case that internally includes a filter element including a filtration member having a substantially cylindrical shape that filters the liquid and an inner tube having a substantially cylindrical shape provided inside the filtration member. The inner tube includes a partition plate that covers a hollow portion of a side surface. A heater provided on a bottom surface of the filter case includes a substantially rod-shaped heating unit. The heating unit is inserted into a space surrounded by the side surface and the partition plate of the inner tube via a first hole formed at a position overlapping with the hollow portion of the inner tube in the first plate that covers a lower end of the filtration member.

Systems, devices, and methods of filtering water include a dome shaped lid and middle disk to separate filtration media materials. The domed shaped lid eliminates air locks in the filter media that can slow or stop the filtration process. A flow control output port regulates the flow level and flow speed of the filtered water. An angled flow output port improves flow by accelerating flow at an angled bottom section of the filter. Water permeable filter bag materials house the filter media. An additional washing process improves the taste of the filtered water. A color change resin in the mixed bed resin indicates expiration of the filter. Similarly, a filter expiration indicator assists users in determining when a filter should be replaced. An integrated TDS meter is used for testing the filtered water. The devices can be used individually or in combination to provide performance improvements.

An air vent hole includes a substantially columnar hole main body portion, a first hole portion formed on the upper side of the hole main body portion, and a second hole portion formed on the lower side of the hole main body portion. Each of the first hole portion and the second hole portion partly has, in a cross section of the hole portion substantially orthogonal to a first direction that is a longitudinal direction of the hole main body portion, a cross-sectional area smaller than a cross-sectional area of a cross section of the hole main body portion substantially orthogonal to the first direction. A float inserted into the air vent hole is movable between a position where the float occludes the first hole portion and a position where the float occludes the second hole portion. The float occludes the first hole portion under the weight of the float. However, the float is pushed up by air. Furthermore, the float is formed of a material having a smaller specific gravity than a liquid to be filtered. Thus, the float is pushed up by the liquid to occlude the first hole portion.

A water treatment apparatus includes a membrane in a contact with a soil structure, a hollow elongated member being passed through membrane and being mounted vertically within a vertical well with the bottom end of the elongated member being configured to expel treated water into the soil structure, a filtration member mounted stationary or for a linear reciprocal movement so as to filter the water prior to entry into a hollow interior of the elongated member, a trash rack positioned on the membrane and surrounding an upper portion of the elongated member and a barrier positioned adjacent and/or on said peripheral side wall of said trash rack, said barrier configured to reduce flow of the water and/or absorb a portion of the contaminant(s) prior to the water entering said filtration member.

The invention relates to a filter cartridge for insertion in a filter housing of a fluid filter, comprising: a filter material configured to filter a fluid flowing therethrough from a raw side to a clean side of the fluid filter during operation of the fluid filter; and a filter-cartridge-side radio module configured to move, during operation of the fluid filter, according to the pressure difference between the raw side and the clean side of the fluid filter, which pressure difference depends on the degree of contamination of the filter material, and to communicate, in order to ascertain the degree of contamination of the filter material, with a housing-side radio module of the fluid filter, the distance (A) of which housing-side radio module from the filter-cartridge-side radio module varies upon movement of the filter-cartridge-side radio module.

Devices and methods associated therewith for facilitating movement, removal and/or installation of components from treatment units (e.g., water treatment units and wastewater treatment units). The treatment unit can take the form of a granular media filter (e.g., upflow filter, downflow filter or bi-flow filter) or a sludge collection basin. One preferred device is one or more floats facilitating safe removal of components of a treatment unit. The float(s) can be operably associated with an air scour system of a water filter to remove the air scour system from a granular media filter bed. The float(s) can be operably associated with a collection grid of a sludge collection container facilitating safe removal of the collection grid from the sludge collection container. Another preferred device is a flexible piping/conduit operably connected to a pressurized air source and an air scour system to assist in removal/installation of the air scour system.

A pool cleaning assembly includes a frame is that may be manipulated thereby facilitating the frame to be urged through a pool. A float is coupled to the top lateral member. The float floats in the pool thereby facilitating the frame to be oriented upright in the pool. A pair of wheels is provided. Each of the wheels is rotatably coupled to the frame to roll along a bottom of the pool. A plurality of brushes is provided and each of the brushes is removably coupled to the frame. Each of the brushes is frictionally engages the bottom of the pool when the frame is urged through the pool. Thus, each of the brushes cleans the bottom of the pool. A screen is removably coupled to the frame. The screen capture debris when the frame is urged in the pool thereby facilitating the debris to be removed from the pool.