A backflow of liquid inside a filter device during an operation of an internal combustion engine is allowed to be obviated while air inside the filter device is purged so as not to generate bubbles in the liquid. An outflow portion that includes a cylindrical portion having a substantially bottomed cylindrical shape and a back pressure valve provided inside the cylindrical portion is provided so as to penetrate a bottom surface of a case. In addition, a lid body provided on the case and an upper plate of a filter element so as to cover an upper end of the case has a first hole that communicates between a space inside the case and a space outside the case. When the back pressure valve opens (a valve body does not abut on a first valve seat), a space inside the filter element communicates with the space outside the case via a second through-hole formed in a side surface of the cylindrical portion.

A chemical liquid purification apparatus includes a tank body, a return tube, a liquid sending pump, a filtration device and a piping. The tank body has a liquid passage port and a circulation port communicated to a storage space inside the tank body. The return tube has one end connected to the circulation port and another end extending to the storage space. The liquid sending pump and the filtration device are located outside the tank body in between the liquid passage port and the circulation port. The piping is connecting the liquid sending pump and the filtration device to the liquid passage port and the circulation port.

A chemical liquid purification apparatus includes a tank body, a return tube, a liquid sending pump, a filtration device and a piping. The tank body has a liquid passage port and a circulation port communicated to a storage space inside the tank body. The return tube has one end connected to the circulation port and another end extending to the storage space. The liquid sending pump and the filtration device are located outside the tank body in between the liquid passage port and the circulation port. The piping is connecting the liquid sending pump and the filtration device to the liquid passage port and the circulation port.

A water purification tumbler includes a main body and a filtration unit. The filtration unit includes an annular wall, a flow conducting member, a high-temperature bamboo charcoal layer, and a low-temperature bamboo charcoal layer. The flow conducting member is disposed inside of the annular wall and defines a flow channel communicating with an opening of the main body. The flow channel has a water inlet section and a water outlet section. The water inlet section gradually narrows downward. The high-temperature bamboo charcoal layer and low-temperature bamboo charcoal layer are connected to the flow conducting member and are disposed respectively above and under the flow channel.

Inside a tank body storing a liquid, a return filter is provided protruding downward from an upper surface of the tank body, and a substantially plate-like (plate-shaped) float is also provided that is inserted into the tank body and floats in accordance with change in a liquid surface of the liquid stored in the tank body. The float is provided with an opening larger than a diameter of a filter case, and in a plan view, the float is disposed between the tank body and the filter case.

Inside a tank body storing a liquid, a return filter is provided protruding downward from an upper surface of the tank body, and a substantially plate-like (plate-shaped) float is also provided that is inserted into the tank body and floats in accordance with change in a liquid surface of the liquid stored in the tank body. The float is provided with an opening larger than a diameter of a filter case, and in a plan view, the float is disposed between the tank body and the filter case.

A pet water dispenser may include a water tank, a pump installed inside the water tank, a water supply pipe connected to the pump to transfer water, and a water supply plate provided at a position higher than an upper end of the water tank and through which water supplied from the water supply pipe flows. The water supply plate may be provided to be spaced apart and above a water guide configured to catch water falling from an edge of the water supply plate and to guide the dropped water back into the water tank.

A pet water dispenser may include a water tank, a pump installed inside the water tank, a water supply pipe connected to the pump to transfer water, and a water supply plate provided at a position higher than an upper end of the water tank and through which water supplied from the water supply pipe flows. The water supply plate may be provided to be spaced apart and above a water guide configured to catch water falling from an edge of the water supply plate and to guide the dropped water back into the water tank.

The technology disclosed herein relates to, in part, a filter assembly having a primary media assembly and a secondary media assembly in fluid communication with the primary media assembly. A filter assembly outlet is downstream of the secondary media assembly. A filtration pathway extends through the primary media assembly, the secondary media assembly, and the filter assembly outlet. A drain pathway extends through the secondary media assembly and the filter assembly outlet, wherein the drain pathway circumvents the primary media assembly.

An in-tank fuel pump assembly and mounting system is disclosed which may be configured for mounting inside a fuel tank. The assembly includes a pump housing, pump mounted to the housing, and pressure relief valve. The housing may comprise upper and lower pump housing units coupled together. The upper housing unit is configured for mounting to a tank opening, which in one implementation may be the fuel fill opening. The lower housing unit extends into the tank to approximately the bottom of the tank. A fuel fill fluid pathway is created through the housing for adding fuel to the tank while the pump assembly remains in situ. The upper housing unit may include a removable fuel cap. The pump housing may include an integral vapor trap.