1
Verify the Connection
Compare the existing tubing, stem, or threaded port with the specifications above.
1/8″ MNPT × 1/4″ OD Quick-Connect Check Elbow Fitting for RO Membrane Waste Line, SKU# FT-EL-18-CH
$1.99
- Description
- Additional information
- Reviews (0)
Description
RO tubing & fitting accessory
Connect an RO membrane waste port to 1/4″ OD tubing with a built-in check valve
This 90° check elbow is designed for the waste/drain side of compatible RO membrane housings with a 1/8″ threaded port. The integrated check valve helps maintain one-way flow while the elbow provides compact routing to standard 1/4″ OD RO tubing.
1/8″ MNPTThreaded housing side
1/4″ OD QCWaste-line tubing
Check valveOne-way flow
SKU FT-EL-18-CHMyAquaFilter SKU
Key benefits
Compact connection hardware for clean, serviceable filtration layouts
Built-In Check ValveHelps prevent reverse flow through the fitting.
Waste-Line UseDesigned for compatible RO membrane drain/waste ports.
Compact ElbowReduces tubing bend and saves installation space.
Quick ConnectAccepts standard 1/4″ OD tubing.
Specifications
Product details
| Product type | Quick-connect elbow with integrated check valve |
|---|---|
| Thread side | 1/8″ MNPT |
| Tubing side | 1/4″ OD quick-connect |
| Shape | 90° elbow |
| Application | RO membrane housing waste/drain line |
| System type | Traditional under-sink RO systems |
| Thread sealing | PTFE tape required on 1/8″ MNPT side |
| Quantity | 1 fitting |
| Listed shipping dimensions | 6 × 4 × 1 in |
| Listed shipping weight | 1 oz |
| SKU | FT-EL-18-CH |
Before installation
- ✓Confirm tubing, stem, and thread sizes before ordering
- ✓Shut off water and depressurize the filtration system before service
- ✓Cut push-connect tubing square and insert it fully
Installation
Use thread seal only where the connection actually requires it
2
Install Fully
Seat push-connect tubing completely. Apply PTFE tape only to compatible threaded connections.
3
Pressure-Test
Restore water gradually and inspect all serviced connections before regular use.
Good to know
Similar-looking fittings may have different functions
!
OD means outside diameter1/4″ and 3/8″ tubing sizes refer to tubing outside diameter.
!
Do not force fittingsIf a fitting does not seat normally, re-check the connection type and size.
This is a check-valve elbow specifically described for the RO membrane waste/drain line. Do not substitute it for a plain elbow unless the system design calls for a check valve at that location.
Not sure this fitting is correct?Send a clear photo of the existing connection and tubing size.
Additional information
| Weight | 1 oz |
|---|---|
| Dimensions | 6 × 4 × 1 in |
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