Verifying proper credentials before hiring protects against poor installation quality and inappropriate system recommendations for PFAS specifically.
- Confirm a valid state plumbing contractor license for installation work.
- WQA certification indicates specialized water treatment training relevant to PFAS-specific selection.
- Verify the specific system’s NSF/ANSI 53 or 58 certification separately from contractor credentials.
- These are two distinct verification steps: contractor qualification and product certification.
Plumbing Licensing
Whole-home or under-sink system installation typically involves plumbing work, requiring a valid state plumbing contractor license for proper installation.
Water Quality Association Certification
Water Quality Association (WQA) certification indicates specialized training relevant to PFAS-specific system selection and installation beyond general plumbing.
Verifying System Certification Separately
Beyond contractor credentials, verify the specific system itself carries NSF/ANSI 53 or 58 certification for PFAS reduction — contractor credentials and product certification are separate verification steps.
How to Actually Verify a Licence
A licence number on a business card or a website is a claim rather than a verification. State licensing boards generally publish a searchable register, and checking the number there takes a few minutes and confirms three things at once: that the licence exists, that it is current, and that it belongs to the entity you are dealing with.
That last point is the one most often missed. Work is sometimes carried out by a business trading under a different name from the licence holder, or by subcontractors whose credentials nobody has checked. Asking who will physically be on site, and confirming their status rather than the salesperson’s, is the useful version of this question.
Insurance and Bonding Are Separate From Licensing
A licence establishes that somebody is permitted to do the work. It says nothing about what happens if the work causes damage. Liability insurance and, where it applies, bonding are separate protections, and they are worth confirming separately rather than assuming a licence implies them.
The verification here is a certificate issued by the insurer rather than a photocopy supplied by the contractor, and it is a routine thing to request. Workers compensation coverage is worth asking about on the same call, since the consequences of its absence can reach the property owner.
Permits and Who Is Responsible for Pulling Them
Plumbing work often requires a permit and an inspection, and both are normally the installer’s responsibility. It is worth confirming that explicitly, because unpermitted work has a way of surfacing much later, typically during a sale, when it is at its most expensive to resolve.
Where an inspection takes place, ask for the documentation afterwards. Together with the system certification and the installation invoice, it forms the record that shows the work was done properly, which is exactly what a future buyer or their surveyor will want to see.
FAQ
Is contractor licensing enough, or do I also need to check the product?
Both matter separately — contractor licensing ensures proper installation, while product certification (NSF/ANSI 53 or 58) ensures the system actually reduces PFAS as claimed.
How do I check a contractor’s licence is real and current?
Search the number on your state licensing board’s own register rather than relying on the number as printed. Confirm it is current and that it belongs to the entity you are actually contracting with.
Does a licence mean the contractor is insured?
Not necessarily. Licensing, liability insurance and bonding are separate, and the insurance is best confirmed by a certificate from the insurer rather than a copy supplied by the contractor.
Who is supposed to obtain the permit?
Normally the installer, but confirm it in writing rather than assuming. Unpermitted plumbing work tends to surface during a later sale, which is the most awkward point at which to deal with it.
Verify both contractor credentials and specific product certification separately — one doesn’t guarantee the other.
These statements have not been evaluated by the Food and Drug Administration. This information is not intended to diagnose, treat, cure, or prevent any disease. Content is for informational purposes only and is not medical advice; consult a qualified healthcare provider before starting any supplement. As an Amazon Associate we earn from qualifying purchases.
