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💧 Rinnai Tankless Specialists

Keep Your Tankless
Water Heater Running Like New

Professional water-side maintenance for Rinnai tankless units. Inlet filter replacement and full vinegar descale flush — performed by trained technicians who protect your warranty and your investment.

Schedule Service What We Do
✓ Rinnai Warranty Compliant
✓ Water-Side Services Only
✓ Quality Parts Used
✓ Written Service Agreement Every Visit
📞 (919) 928-2604
Simple Process

How FlushPro Works

We handle everything. No surprises, no upsells — just reliable annual maintenance that protects your investment.

01

Book Online or Call

Choose your service, pick a time, and receive a written service agreement before we arrive. No surprises.

02

Technician Arrives

Our trained tech inspects the unit, confirms scope of work, and reviews the service agreement with you on-site.

03

Service Performed

Water-side maintenance only: inlet filter replacement and/or full 45–90 minute vinegar descale flush.

04

Report Delivered

You receive a digital service report with photos, steps completed, and your next recommended service date.

What We Offer

Our Services

FlushPro specializes exclusively in water-side maintenance. We do two things, and we do them exceptionally well.

FlushPro technician performing vinegar flush on Rinnai tankless water heater

Professional water-side maintenance — pump, hoses, vinegar flush — exactly the way Rinnai recommends it.

🔧 Inlet Filter Replacement

Your Rinnai's inlet filter is the first line of defense against sediment, debris, and mineral buildup — and most homeowners never replace it. A clogged filter chokes water flow, triggers error codes, and forces your unit to work harder every single time you turn on a tap. FlushPro uses The Tankless Tool® — the only professional-grade removal tool engineered specifically for Rinnai units — and installs the correct H98-510-S filter assembly. It's the right filter, installed correctly, every time.

Included in every visit

💧 Vinegar Descale Flush

We circulate 3 gallons of plain white distilled vinegar through the heat exchanger for 45–90 minutes — exactly per Rinnai's official recommendation. Dissolves mineral scale buildup that reduces efficiency and triggers error codes. No chemical descalers, ever.

Included in every visit

📋 One Service. Done Right.

FlushPro does one thing: a complete annual maintenance visit that includes both inlet filter replacement and a full vinegar descale flush. We don't offer partial services — because partial maintenance isn't maintenance. Every visit covers everything your Rinnai needs to run at peak efficiency for another year.

One flat rate · All in
Transparent Pricing

Flat-Rate Price Sheet

No hidden fees. Price is set by unit accessibility — you'll know the exact cost before we begin.

Tier 1 — Standard Access

Garage or Utility Room

$85 flat rate

Unit in a garage, utility closet, or mechanical room with standing room.

  • Inlet filter replacement (H98-510-S)
  • Full vinegar flush (3 gal / 45–90 min)
  • Pre/post photos
  • Digital service report
Tier 2 — Walk-In Crawl Space

Walk-In Crawl Space

$110 flat rate

Unit in a walk-in crawl space where the technician can stand or move freely.

  • Inlet filter replacement (H98-510-S)
  • Full vinegar flush (3 gal / 45–90 min)
  • Pre/post photos
  • Digital service report
Tier 3 — True Crawl Space

Crawl Space / Restricted Access

$135 flat rate

Unit requires crawling to access. Confined space with limited mobility.

  • Inlet filter replacement (H98-510-S)
  • Full vinegar flush (3 gal / 45–90 min)
  • Pre/post photos
  • Digital service report
Note: All prices are flat-rate and include parts and labor. If service cannot be safely completed due to pre-existing conditions, equipment is returned to its original state and a written explanation is provided at no charge. Signed service agreement required before all work.
Beyond Our Scope

When Your Unit Needs Repairs

We specialize in preventive maintenance — not repairs. If your unit needs more, here's exactly what we do.

We Don't Do Repairs — And That's Intentional

FlushPro technicians are trained exclusively for water-side maintenance. We do not diagnose error codes, replace burners, service gas valves, or open units. When our technician identifies a problem beyond our scope, we follow a clear escalation process to get you the right help fast.

Step 1

Technician documents the issue with photos and a written description on-site.

Step 2

You receive a written summary of what was observed and why service was paused or declined.

Step 3

We refer you to a Rinnai-certified technician in your area who can address the repair properly.

Step 4

Once repairs are complete, we return to complete your maintenance service.

Outside FlushPro's Scope — Always Referred Out:

Error code diagnosis · Gas line service · Internal component replacement · Isolation valve replacement · Venting inspection · Electrical troubleshooting · Warranty repair claims · Any service requiring opening the unit

Do It Yourself

FlushPro DIY Maintenance Guide

FlushPro
DIY Guide
Rinnai Tankless Water Heater
Maintenance Manual
$39

The Same Procedures Our Technicians Use

Prefer to do it yourself? Our 16-page PDF guide walks you through the complete filter replacement and vinegar flush procedure step-by-step — with shopping lists, individual Amazon links, a printable service log, and troubleshooting reference.

  • Complete parts shopping list with Amazon links
  • 15-step inlet filter replacement procedure
  • 24-step vinegar descale flush procedure
  • Printable annual service log
  • 8-problem troubleshooting reference
  • Safety rules and scope warnings included
Purchase Guide — $39
Get In Touch

Book a Service or Ask a Question

📞

Call or Text

(919) 928-2604
Daily 10am–3pm

✉️

Email

carterjdell@gmail.com
Response within 24 hours

📍

Service Area

Chapel Hill, Durham, Raleigh,
Carrboro & surrounding areas

Business Hours

Monday – Sunday10:00am – 3:00pm
📋 Service Agreement & Indemnification ▼ Read Agreement
Scope of Service — Water-Side Maintenance Only

FlushPro provides water-side maintenance exclusively. Services are limited to: (1) inlet filter replacement using the Rinnai H98-510-S assembly, and (2) vinegar descale flush using plain white distilled vinegar per Rinnai's published maintenance guidelines. FlushPro does NOT open the unit, work on gas lines, replace internal components, or perform repair work of any kind.

1. Scope Limitation

FlushPro's services are limited to water-side inlet filter replacement and heat exchanger vinegar flush only. No other services will be performed without a separate written agreement.

2. Warranty Compliance

FlushPro's services are designed to be fully compliant with Rinnai's manufacturer warranty requirements. FlushPro uses only plain white distilled vinegar and OEM-compatible replacement parts.

3. Pre-Existing Conditions

Customer acknowledges that FlushPro is not responsible for pre-existing damage, deficiencies, or warranty violations. This includes corroded fittings, deteriorated shutoff valves, leaking connections, evidence of prior unauthorized modifications, and prior use of chemical descalers.

4. Indemnification

Customer agrees to indemnify and hold harmless FlushPro Water Heater Services, its employees, contractors, and agents from any and all claims, damages, losses, or expenses arising from: (a) pre-existing conditions not caused by FlushPro, (b) failure of components outside the water-side maintenance scope, and (c) any issues requiring Rinnai-certified repair technicians.

5. Limitation of Liability

FlushPro's total liability for any claim shall not exceed the amount paid for the specific service visit. FlushPro is not liable for consequential, incidental, or indirect damages of any kind.

6. Extended Flush

If heavy scale is detected during service (brown vinegar after 45 minutes), an extended 90-minute flush will be recommended and carries an additional $25 charge. Customer will be notified before proceeding.

7. Right to Refuse

FlushPro reserves the right to decline service at any time if safety concerns, pre-existing damage, or inoperative shutoff valves are identified. No charge will apply if service is declined.

8. Photo Documentation

Customer consents to FlushPro photographing the unit and completed work for service documentation purposes. Photos are included in the digital service report emailed upon completion.

Legal Notice

This agreement constitutes the entire understanding between the parties regarding the service visit. A digital copy will be included in the service report email. These terms apply to the fullest extent permitted by applicable law. Nothing in this agreement limits liability for gross negligence or willful misconduct by FlushPro personnel.

Please read and accept the service agreement before submitting.
✅ Request received! We'll contact you within 24 hours to confirm your appointment.