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  2. North American Fire Hose Coupler Incompatibilities - Wikipedia

    en.wikipedia.org/wiki/North_American_Fire_Hose...

    Additionally, suction hose requires the use of suction gaskets to prevent air from entering, which are not used on other types of hoses, which use gaskets that seal with the addition of water pressure (and sometimes leak when not enough pressure is present). 2 + 1 ⁄ 2-inch attack port with 2.5-7.5 NH threads

  3. Circulator pump - Wikipedia

    en.wikipedia.org/wiki/Circulator_pump

    The traditional hot water recirculation system uses the existing cold water line as return line from the point of use located farthest from the hot water tank back to the hot water tank. The first of two system types has a pump mounted at the hot water heater while a "normally open" thermostatic control valve gets installed at the farthest ...

  4. Quick connect fitting - Wikipedia

    en.wikipedia.org/wiki/Quick_connect_fitting

    Quick connect fittings are intended to be applied more easily than traditional fittings, requiring only that the pipes be pushed together firmly to lock the teeth of the fitting firmly. The teeth are forced deeper into the tubing when opposing force is applied to them, preventing their separation from the tubing.

  5. Air-line fitting - Wikipedia

    en.wikipedia.org/wiki/Air-line_fitting

    A coupled pair consists of a male nipple or plug and a female coupler or socket. One side is connected to a flexible supply hose; the other may be attached to a manifold, valve, tool, or another hose. A female coupler is used on the supply side, and a male nipple is used on the receiving side.

  6. Victaulic - Wikipedia

    en.wikipedia.org/wiki/Victaulic

    Victaulic specializes in the development of couplings, valves, and fitting technologies for a variety of industries. Its main products are: Grooved couplings used to join mechanical pipes together. [3] The company produces a variety of these grooved couplings along with other technologies since it was founded. [4]

  7. Pressure-balanced valve - Wikipedia

    en.wikipedia.org/wiki/Pressure-balanced_valve

    It has a diaphragm or piston inside that reacts to relative changes in either hot or cold water pressure to maintain balanced pressure. As water pressure drops on one supply line, the valve reduces the pressure in the other supply line to match. A side effect of this is that the pressure and flow at the shower head or tub spigot will drop twice ...

  8. Dapol - Wikipedia

    en.wikipedia.org/wiki/Dapol

    Dapol Ltd is a model railway manufacturer based in Chirk, Wales. The factory where some of the design and manufacturing take place is just over the border in England . The company is known for its model railway products in N gauge , OO gauge and O gauge.

  9. Eccentric reducer - Wikipedia

    en.wikipedia.org/wiki/Eccentric_reducer

    Because eccentric reducers are asymmetrical, they create asymmetrical flow conditions; flow is faster along the angled side, resulting in increased pressure. [ 1 ] [ 2 ] Horizontal liquid reducers are always eccentric, with the flat side on the top, which prevents the build up of air bubbles in the system, (unless on control set, same as PV, TV ...