In an exemplary embodiment, an emergency backflow preventing system is disclosed that includes an inflatable bladder, an air supply line demountably coupled to the inflatable bladder, a valve demountably coupled to the air supply line, and an air source functionally coupled to the valve. The inflatable bladder includes a deflated state and an inflated state and is substantially void of air in the deflated state. The inflatable bladder is configured to be inserted within a sewage pipe when in the deflated state. The inflatable bladder is configured to contact a bore of the sewage pipe when in the inflated state and thereby wedge itself within the sewage pipe. The inflatable bladder comprises an elastic polymer. The valve comprises a Schrader valve and an air pressure gauge. A cable is positioned within the air supply line and is anchored within the valve and the inflatable bladder.

A logic-based building water supply management system having a minimal number of components to supply water on a qualifying-demand basis, thereby preventing major building flooding due to water plumbing leaks. The components are an electrically actuated valve downstream of the main building water supply valve, an accumulator tank immediately downstream of the valve, a tank pressure sensor, an electronic control module (ECM) and a manually operated bypass valve. The valve remains in a failsafe closed position unless a determination of qualifying demand is made. With the valve closed, all water flowing in the building may only come from the tank. As water flow stank, the measured tank supply pressure decays. The ECM compares the pressure decay rate to preprogrammed values so as to distinguish normal demand from a leak and takes appropriate action by opening the valve or disabling it from opening, and alarming, until a system reset is initiated.

A water supply system includes a water storage tank having a storage tank outlet, the water storage tank configured to store a volume of water at a first pressure. A pressure tank is in fluid communication with the water storage tank and is periodically fillable with water from the water storage tank. An air source is fluidly connected to the pressure tank to pressurize the volume of water in the pressure tank to a second pressure greater than the first pressure. A pressure tank output line is fluidly connected to the pressure tank to output water from the pressure tank.

A filtered water storage system includes a housing having a base wall and a perimeter wall is attached to and extending away from the base wall. The housing has a first length dimension is less than 6.0 inches, a second length dimension is less than 16.0 inches and a third length dimension is less than 20.0 inches. A plurality of tanks is positioned within the housing and each tank includes a water connection. A water conduit positioned in the housing is fluidly coupled to each of the water connections. The water conduit extends through the perimeter wall and has a free end positioned outside of the housing. The free end is configured fluidly coupled to the water filtration system and a spout. The water connections receive filtered water from the water filtration system to fill the tanks with filtered water to be accessed by the spout.

A bladder-type pressure tank includes an outer shell, a bladder, a nozzle, and an elbow pipe. The outer shell includes a liner and a glass-fiber layer covering the outer surface of the liner. The liner includes polyethylene (PE). The liner further includes a chamber, a first opening, and a second opening. The bladder is disposed in the chamber. In an inflated state of the bladder, a gap is formed between the inflated bladder and the inner surface of the liner. The bladder includes polyurethane (PU). The nozzle is integrated with the bladder, and is disposed in the first opening and seals the first opening. The elbow pipe includes a first end and a second end. The first end of the elbow pipe is disposed in the second opening and communicates with the chamber; and the second end of the elbow pipe is configured to connect to a pipeline.

A container for a waste heat utilization circuit may include a housing that defines a housing interior such that the housing interior can be flowed through by a working medium. A sheath may be arranged in the housing interior for accommodating an auxiliary medium. The sheath may be fluid-tight and heat-conductive at least in certain areas. The sheath may define a sheath interior of variable volume.

An improved expansion tank is provided for at least temporarily storing a pumped liquid under pressure, the expansion tank comprising a thin walled outer shell formed of two substantially hemispherical domes joined together, either directly or at the two ends of a central, substantially cylindrical section, and a flexible diaphragm located internally of the tank and secured to the inner surface of the shell of the tank to divide the internal volume of the tank into a fluid-tight section holding a gas under pressure and a fluid-tight section for holding an aqueous liquid under pressure. The improvement comprising diaphragm coupling ring formed as a discrete part of the diaphragm tank that can be fabricated independent of the domes and any cylinder. The diaphragm coupling ring provides a robust, leak-proof seal with the diaphragm, so that it can be connected onto an inner surface of an expansion tank in a separate, secondary operation.

A storage system comprising one or more storage units having a body comprising an inner frame, and an outer frame defining an inner space, at least one portion of the inner frame being located within the inner space defined by the outer frame, wherein at least one or more particular portions of the inner and outer frame are adapted to be attached to each other providing reinforcement to at least some portions of the outer frame. The body of the storage unit comprises walls and a roof attached to each other for defining an inner space within the body, the walls and the roof comprising indentations extending into the inner space, wherein the indentations define counterpart fastening means for receiving fastening means. There is also provided a bracket system for attachment to the counterpart fastening means permitting attaching cladding to the walls of the storage units.

One or more techniques and/or systems are disclosed for a tank assembly that provides antimicrobial protection to inhibit microbial growth in the interior of the tank body. The tank assembly can comprise a body with a side wall and one or more end walls. An antimicrobial liner can be disposed in the interior of the tank body to cover interior surfaces of the side wall and end wall(s). The antimicrobial liner can comprise an effective amount of an antimicrobial agent to inhibit growth of microbes in the interior of the tank body. In this way, the operation life of the tank assembly may be improved, and problems associated with biofilm fouling may be mitigated.

A gas and liquid-tight inlet connector to the inner chamber of a mufti-chamber pressure vessel is provided, comprising: a male gland extending through an orifice in the bottom of the flexible wall of the inner chamber and the lower wall of the rigid outer shell of the vessel, the male gland comprising an upper flange permanently, sealingly connected, with the lower surface of the flexible inner wall, so as to form a gas- and liquid-tight seal therewith, and a lower elongated member extending through the outer shell to be sealingly connected with a liquid inlet pipe, permitting liquid flow into the inner chamber, while maintaining the seal between the inner and outer chambers of the tank, thus maintaining pressurization in the outer chamber, as fluid enters the inner chamber, pushing the flexible wall upwardly into the outer chamber.