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Fernco 1006-64 6" Concrete to 4" CI/PL Flexible PVC Coupling
Manufacturer Resources
Product Specs
- Department:
- Plumbing
- Product Group:
- Plumbing Fittings
- Product Subgroup:
- Couplings
- Product Type:
- Flexible Coupling
Fernco 1006-64 – Frequently Asked Questions
1) What sizes does the Fernco 1006-64 flexible coupling connect?
The Fernco 1006-64 is a reducing coupling that joins 6 inch concrete pipe on one end to 4 inch cast iron or plastic pipe on the other. It is a single-size part, so there is nothing to specify beyond the model number 1006-64.
2) Can I use the Fernco 1006-64 to tie a 4 inch PVC line into an existing 6 inch concrete sewer pipe?
That is exactly what it is built for. The larger end takes 6 inch concrete pipe, the smaller end takes 4 inch plastic or cast iron, so a PVC building drain lands correctly on the 4 inch side. If both of your pipes are the same nominal size, you want a straight coupling instead of this reducer.
3) Will the Fernco 1006-64 work on cast iron as well as PVC on the 4 inch side?
Yes. The 4 inch end is rated for both cast iron and plastic pipe, so it handles a cast iron to concrete transition as well as a PVC to concrete one. Outside diameters differ between materials, which is why the coupling is specified by pipe material and not just nominal size.
4) Is the Fernco 1006-64 a rubber coupling with clamps or a solid fitting?
It is a flexible coupling, not a rigid glued or hubbed fitting. The elastomeric sleeve slips over both pipe ends and is drawn down with the band clamps, so it absorbs minor misalignment and settlement between the concrete and the 4 inch line rather than transferring stress into the joint.
5) Do I need any glue, solvent cement or primer to install the Fernco 1006-64?
No solvent cement, primer or heat is required. This is a mechanical joint: clean both pipe ends, slide the sleeve on, and tighten the clamps. That makes it workable in a wet trench or an existing line you cannot dry out, which is where transitions to concrete pipe usually happen.
6) What is the Fernco part number for a 6 inch concrete to 4 inch reducing coupling?
Fernco calls it the 1006-64. The 1006 prefix designates the concrete to cast iron/plastic family and the -64 gives the size combination, 6 inch down to 4 inch. Order by that full number so you do not end up with a same-size version.
7) Can the Fernco 1006-64 be buried underground on a sewer line?
Flexible couplings of this type are used on buried drain, waste and vent and sewer piping, which is the normal application for a concrete to 4 inch transition. Note that some jurisdictions require a shielded coupling with a stainless steel shear band for buried or above-ground use, so check what your local inspector accepts before backfilling.
How fast can I get the Fernco 1006-64 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Fernco 1006-64 come with a warranty?
Absolutely. The Fernco 1006-64 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Fernco 1006-64?
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selection,
installation tips, and troubleshooting. Contact Us
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