---
product_id: 336303196
title: "Polylok Extend & Lok 4\" For Effluent Filters"
brand: "polylok"
price: "$125.88"
currency: USD
in_stock: true
url: https://www.desertcart.us/products/336303196-polylok-extend-and-lok-4-for-effluent-filters
store_origin: US
region: United States of America
---

# Universal 4" pipe fit Tool-free, glue-free install Lightweight at 0.3 lbs Polylok Extend & Lok 4" For Effluent Filters

**Brand:** polylok
**Price:** $125.88
**Availability:** ✅ In Stock

## Summary

> 🔧 Effortless fit, zero fuss—upgrade your effluent filter game today!

## Quick Answers

- **What is this?** Polylok Extend & Lok 4" For Effluent Filters by polylok
- **How much does it cost?** $125.88 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/336303196-polylok-extend-and-lok-4-for-effluent-filters)

## Best For

- polylok enthusiasts

## Why This Product

- Trusted polylok brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Durable Design:** Built to last with reliable materials ensuring long-term effluent filtration performance.
- • **Hassle-Free Setup:** No gluing or special tools needed—install in minutes and get back to business.
- • **Compact & Lightweight:** At just 0.3 lbs and compact dimensions, it’s easy to handle and store.
- • **Effortless Maintenance:** Simplifies your filtration system upkeep with quick access and easy replacement.
- • **Seamless Compatibility:** Fits any 4" pipe center filter or tee under riser for effortless integration.

## Overview

The PolylokExtend & Lok 4" Effluent Filter adapter fits any standard 4" pipe center filter or tee under riser, enabling quick, glue-free installation. Lightweight and compact, it streamlines your filtration setup with durable construction and easy maintenance.

## Description

PolylokExtend & Lok 4" For Effluent Filters

## Features

- Fits any 4" pipe
- Centers filter or tee under riser
- Easy Installation
- No gluing necessary

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Product Dimensions | 21.59 x 11.43 x 11.43 cm; 136.08 g |
| Item Weight | 0.3 Pounds |
| Number of pieces | 1 |
| Batteries required | No |

## Images

![Polylok Extend & Lok 4" For Effluent Filters - Image 1](https://m.media-amazon.com/images/I/41jI6HwMfgL.jpg)

## Questions & Answers

**Q: Manufacturer says this can be used to extend an inlet pipe. Using this on an inlet pipe to a tank may create clogs. has any had problems?**
A: Discharging my rv into the septic inlet using this piece connected to pvc.  No clogs so far.

**Q: Do you have the 6 inch extend & lok ?**
A: Yes, https://www.amazon.com/PolyLok-Extend-Lok-Effluent-Filters/dp/B085T216N7/ref=sr_1_2?crid=1C80QAOEMN52E&keywords=Polylok+6%22+Extend+%26+Lok%E2%84%A2+for+Effluent+Filters&qid=1640266938&sprefix=polylok+6+extend+%26+lok+for+effluent+filters%2Caps%2C81&sr=8-2

**Q: What is the outter diameter of the small end (that gets twisted into the existing). It should be smaller than 4 inches so it can eventually snug up.**
A: It is less than 4 inch as it did slip into the 4 inch pipe.  But I've already installed so can't measure.

**Q: Will this work on inlet clay pipe**
A: "Fits any pipe with an inside diameter of 4"
https://www.youtube.com/watch?v=iFqMv1P4h_E&feature=emb_imp_woyt
Fits: Clay, Cast Iron, SCH 40 PVC / ABS, and SDR 35 PVC pipe.

## Frequently Bought Together

- Polylok 4" Extend & Lok™ for Effluent Filters
- Polylok PL-68 Effluent Filter & Housing (Baffle/Tee)
- Tuf-Tite Effluent Filter EF-4 Combo

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-04-26*