Best Three pieces Check Valves

uxcell 10pcs 7mm Nylon Solid Plastic Bearing Balls G1 Precision

Size - 7mm Diameter. The package includes 10 pieces of balls.
Material - Made of PA66 nylon, with greater wear resistance and high-temp resistance than POM..
Features - PA66 is commonly used for applications that require high strength, hardness, and rigidity. It has good electrical and dielectric properties..
Applications - Nylon bearing balls are especially useful for low load bearings, special valves, check valves, fluid level indicators, carburetors, flow meters, laboratory devices..
Notice - Confirm the Ball Diameter before ordering..

One piece of 25 feet black airline tubing.
Standard 3/16" diameter fits all standard outlets, including air pumps, check valves, filtration system, air stones, air flow control valves, and aquarium ornaments.
Remains kink-resistant for long periods and blending better with aquarium decor.
Safe for salt and freshwater aquatic environments.

Application: the check valve can be applied for common aquarium air pumps, protect you air pump by preventing aquarium water from back siphoning....
Quality: made of quality plastic, durable and sturdy, not easy to break, ensure long time of usage.
Practical design: the valves are detachable, you can unscrew to open it so as to clean and repair them easily.
Measurement: the air hole diameter is 4 mm/ 0.16 inch, the overall length is approx. 4.2 cm/ 1.7 inches, proper size for most fish tank.
Package contents: 20 pieces air pump check valves, sufficient for daily using and replacement.

Function: the check valves are applicable for fluid systems to prevent countercurrent liquids, or for pneumatic systems to prevent reverse flow of compressed air.
Material and size: the one way check valves are made of PVDF, sturdy, wear-resistant and durable for long-term use.
Each check valve measures 6.3 mm/ 1/4 inches, the total length is 38 mm/ 1.50 inches.
Features: the pipe port of the check valve is designed with a pagoda-shaped card slot, non-slip and non-toxic, with good airtightness and good adsorption performance.
Easy to install: the non-return check valve is easy to install, convenient for you to unscrew and replace.
Application: the non-return check valves are widely applied for automotive parts, machinery industry, household appliances, agriculture, etc..

【PVC Ball Check Valve】Schedule 80 PVC ball check valves have a spherical ball inside the valve body which works as a check to allow flow in one direction and close off to prevent back-flow..
【INSTALLATION TIP】PVC union check valves are designed for VERTICAL installations, MUST be used in an upflow position to work properly. Check valves MUST be installed with the valve's flow arrow pointing in the direction of the flow. Do not install valve upside down.（NOTE: NO SPRING).
【PVC Union Check Valve】True union check valve, can be taken apart for cleaning, allows for easy removal without breaking down the piping connection..
【Material】1'' Slip check valve made of PVC material, O-ring with EPDM material, low-temperature-resistant, impact-resistance, ultraviolet-resistance, rust-resistance. Fits for Schedule 80 1 Inch Pipe..
【Application】PVC Swing Check Valve 1’’(DN25) - Non-return or "one way" valve is ideal for flow control, such as commercial plumbing, aquariums, irrigation, swimming pools, water parks and OEM applications..

Three independent regulating valves - control sweep and latch closing speeds, also back check cushion..
Supplied with both wood and machine screws.

Replacement for General Pump Check Valves Kit - Kit 1, Valves and O-Rings (K01).
Complete Valve Kit Includes Six O-rings and Six Check Valves Complete.
High Quality Material for Best Performance.

Body Material:Stainless Steel 316,200PSI/PN16,ANSI B1.20.1.
Working Pressure 200 WOG,Port Types:Female x Female threaded.
Temperature range: -60 to 450 degree Fahrenheit,Suitable for full range of liquids and gas.
Check valves are used to help direct flow in one direction. The stainless steel bodies and PTFE seals are highly corrosion resistant allowing these check valves to be used with a wide variety of fluids including, but not limited to water, oil, gas, air, light alkali's, acids, biodiesel, fuels and alcohols..
Swing check valves are for horizontal use only. When fluid pushes on the stopper in the correct direction, it will "swing" open to allow flow. If flow moves in the opposite direction, it will swing shut. The check valve cannot be used in vertical applications as gravity may affect the function of the swinging motion..

Includes One-Piece Cartridge: Simplifies installation and maintenance..
Double Ceramic Pressure Balance Cartridge: Combination of Ceramic Disc Mixing Valve and a Ceramic Balancing Spool in a one-piece cartridge..
Ceramic Disc Mixing Valve: Assures a lifetime of drip-free performance and smooth handle operation..
Ceramic Balancing Spool: Maintains a constant output temperature in response to changes in relative hot and cold supply pressure. Ceramic material is unaffected by mineral deposits and harsh water conditions..
Integrated Check Valves: Engineered to eliminate cross flow..
Adjustable Hot Limit Safety Stop: Limits the amount of hot water allowed to mix with cold. Reduces the risk of accidental scalding..
Comfort Zone: Offers a wider shower range to fine tune the desired temperature within the useful temperature zone..
Back-to-Back Capability: Hot and cold can be reversed quickly and easily..
For Use with Flash Shower Rough-In Valves.