Check and Flow Control for Sanitary Waterways
Compare DN models for conventional check positions and short DS models for shallow cavities. Compare HL when flow restriction is also needed, and DT for regular removal and cleaning.
Separate the Check Function from Flow Restriction
A check valve prevents reverse flow; a restrictor limits forward flow. Required functions, available depth and removal access determine which models to compare.
Start with the Task
Backflow prevention only
Compare DN1300, DN1400 and DN1500 by position and size for hand showers, overhead showers and shower-pipe ends.
A standard body will not fit
Compare short DS1400 / DS1500 for shallow handles, slim overhead showers and compact fittings.
Combined functions with service access
Compare HL for both functions at one position and T-shaped DT1814 / DT1815 for regular removal and cleaning.
What to Check Before Choosing
Define the functions
Identify whether the position needs a check function only or flow restriction as well.
Measure the cavity
Record bore, usable depth, flow direction and sealing position. Compare DS for limited depth.
Check removal space
For regular servicing, check the DT removal direction and access in the complete product.
Test the assembly
Use the selected sample to check forward flow, check-valve operation and sealing before confirming the order.
Choose a Model for the Application
DN Models | Conventional Check Positions
View Product and Specifications
DN1300 serves hand-shower or hose connections; DN1400 serves hand-shower and overhead ends; DN1500 serves shower pipes and inlet branches. Compare DS1400 / DS1500 on the detail page for shallow cavities.
DT1814 / DT1815 | Removal for Cleaning
View Product and Specifications
T-shaped combined restrictor and check components for shower and pipework positions requiring regular removal and servicing.
HL1400 / HL1500 / HL1814 | Both Functions Together
View Product and Specifications
For a single position in a shower or pipe that requires flow restriction and backflow prevention. Match the selected model dimensions to the assembly.
Short Bodies and Combined Functions Solve Different Problems
Short DS models address limited installation length. HL and DT selection focuses on combined functions and maintenance requirements.
A short body does not itself mean water-saving functionality. Check dimensions and functions separately.
Ordering and Customization
Provide the cavity drawing, installation position and functions. Add supply pressure and target flow when restriction is needed, and state whether regular removal is required.
Selection Questions
What if a standard valve is too long for the handle?
Compare short DS1400 / DS1500, checking diameter, usable depth and sealing position.
Do I need a combined component for a check-only requirement?
Start with DN or DS. Compare HL, DT and other combined formats when flow restriction is also required.
Which models should I compare for regular cleaning?
Review T-shaped DT1814 / DT1815 and check that the complete assembly provides a removal path.
Share the Waterway Drawing and Required Functions
Mark depth, flow direction and maintenance access. State whether the position needs backflow prevention only or flow restriction as well.
DN Models | Conventional Check Positions