PVC End Caps: Duct Protection & Spigot Sealing MVHR

FLX-CS-PVC / FLX-CF-PVC

FLX-CS-PVC and FLX-CF-PVC: Essential End Caps for FLX-REKU System Airtightness

The FLX-CS-PVC and FLX-CF-PVC end caps are vital PVC accessories for the FLX-REKU flexible air distribution system. These components serve a dual purpose: providing effective protection against the contamination of duct interiors during site installation, and permanently sealing unused connection spigots on plenum and distribution boxes to maintain the system's required ATC2 (D) airtightness class.

Installer Focus: Two Types for Precise Application

The system relies on two variants of the end cap, each designed for a specific fitting requirement:

FLX-CS-PVC (Connection Seal - Push-Fit):
- Fits inside the ends of FLX-HDPE and FLX-HDPE-A semi-rigid ducting (e.g., during construction site work).
- Is mounted onto (externally) the connection spigots of the FLX-PLO-75 and FLX-PLO-90 plenum boxes to plug unused outlets.
FLX-CF-PVC (Connection Seal - Female):
- Fits inside the connection spigots of the FLX-PRO-63 plenum and distribution boxes.

All end caps are manufactured from durable PVC and feature a short length of 20mm for minimal profile when installed.

Technical Specification and Sizing Guide

Proper selection depends on the component being sealed. The sizing aligns with the standard FLX-HDPE duct inner and outer dimensions.

**FLX-CS-PVC / FLX-CF-PVC Compatibility**
Product Code	Duct/Spigot Target	Function (Fit)
FLX-CS-PVC-63 / FLX-CF-PVC-63	Ø63mm Ducting / Spigot	Internal / Internal (or External PLO)
FLX-CS-PVC-75 / FLX-CF-PVC-75	Ø75mm Ducting / Spigot	Internal / Internal (or External PLO)
FLX-CS-PVC-90 / FLX-CF-PVC-90	Ø90mm Ducting / Spigot	Internal / Internal (or External PLO)

Value for Investors and Architects

While small, these end caps are fundamental to maintaining system performance. By preventing contamination during construction, they safeguard the antimicrobial properties of FLX-HDPE-A ductwork. Furthermore, their reliable seal ensures that no air leakage occurs through unused outlets on the manifolds, directly preserving the engineered energy efficiency of the overall MVHR installation.