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In-House Plumbing Company

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Allen, TX
In-House Plumbing Company

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Expert, honest Residential Cast Iron Sewer Pipe Replacement with affordable pricing that won't break the bank.

Providing you residential cast iron sewer pipe replacement using Biblical principles with honesty and integrity at a fair price. It's our goal to serve you with the utmost honesty and integrity so that we can uphold our great reputation. We started this company on a strictly referral basis, and referrals continue to be a huge part of our business. Please read some testimonials of what our satisfied customers have said about us.

972-494-1750

10/27/2026

This home in Carrollton, Texas 75007 was one of four Under Slab Cast Iron Pipe Replacement jobs started and completed by In-House Plumbing Company in just one recent week.

If your home’s sewer system is still made of cast iron, now is the time to learn your options. Call 972-494-1750 today to schedule your Free Estimate & Consultation.

Serving Plano, Richardson, Garland & Surrounding Cities.

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10/19/2026

Here is one example of what our customers are saying after having their under-slab cast iron sewer pipes replaced.

We are so thankful to the four homeowners who trusted us to complete their pipe replacement work last week. We appreciate every single family who puts their home in our hands.

If your home still has cast iron sewer lines, now is the time to learn your options. Call 972-494-1750 today to schedule your Free Estimate & Consultation.

Serving Plano, Richardson, Garland & Surrounding Cities.

10/13/2026

Every cast iron sewer pipe replacement starts with a plan — and every house is different.

This is an actual cast iron sewer pipe replacement plan from an In-House Plumbing Company project in Plano, Texas. The blue lines show the route of the new PVC sewer pipe we installed.

Before replacing old cast iron sewer pipes, we look at the existing plumbing layout, fixture locations, where the sewer exits the home, possible rerouting options, and obstacles that may affect the work. All of these things help determine the best replacement plan for that particular home.

This is also why cast iron pipe replacement cost cannot be determined by square footage, number of bathrooms, or what someone else paid. Every home has a different layout and requires its own plan.

If your home still has cast iron sewer pipes, call 972-494-1750 today to schedule your Free Estimate & Consultation.

Serving Plano, Richardson, Garland & Surrounding Cities.
Learn more here:

https://inhouseplumbingcompany.com/

10/05/2026

Check out our new blog post

AI Can Help You Ask Questions—But It Can’t Tell You Which Ones Matter

AI can generate a long list of questions to ask before old cast iron pipe replacement. The problem is that not every question matters to every project.

Some may be generic, apply to a different method of underground pipe replacement, or assume there is only one correct way to perform the work.

Instead of treating an AI checklist like a test for pipe replacement services, show the questions to the contractor. Explain that they came from AI and ask: Which of these questions matter for my house and why? Which don’t matter and why?

You aren’t necessarily looking for answers to every question. You’re trying to better understand the contractor’s process, your home, and the proposed cast iron to PVC conversion.

Ask what they do, why they do it that way, and why it matters. Those conversations can teach you more than simply checking boxes on an AI-generated list and can help you better understand the old cast iron pipe replacement process and, when relevant, the cast iron pipe replacement cost.

👉 Use AI to help start the conversation. Then let the contractor explain which questions actually matter to your project and why.

👉 Read the full blog here:
https://inhouseplumbingcompany.com/ai-questions-cast-iron-sewer-pipe-replacement/

📞 Call 972-494-1750 to schedule your Free Estimate & Consultation.

Serving Plano, Richardson, Garland & Surrounding Cities.

09/14/2026

Here is one example of what our customers are saying after having their under-slab cast iron sewer pipes replaced.

We are so thankful to the three homeowners who trusted us to complete their pipe replacement work last week. We appreciate every single family who puts their home in our hands.

If your home still has cast iron sewer lines, now is the time to learn your options. Call 972-494-1750 today to schedule your Free Estimate & Consultation.

Serving Plano, Richardson, Garland & Surrounding Cities.

Learn more here: https://inhouseplumbingcompany.com/

09/08/2026

Check out our new blog post

Why Fixture Locations Matter in Cast Iron Pipe Replacement

When planning old cast iron pipe replacement, the location of every plumbing fixture matters.

Toilets, tubs, showers, kitchens, washing machines, air conditioning condensation drains, and other fixtures all connect to the underground sewer system. Their locations help determine how a new PVC system should be routed beneath the home and through the yard.

A proper cast iron to PVC conversion is not always as simple as putting new pipe exactly where the old cast iron was. In some homes, pipe replacement services may be able to reroute portions of the system to reduce unnecessary tunneling, improve the layout, or create a more direct path to the sewer connection. Other homes offer very few routing options because each fixture must connect to the new underground piping from its existing location.

That is why underground pipe replacement should begin with measurements and a complete plan before excavation starts.

Fixture locations also help explain why cast iron pipe replacement cost cannot be based on square footage alone. Two homes of similar size can require very different amounts of tunneling, trenching, and plumbing work.

Every home is different, and the replacement plan should reflect the way that particular home was built.

👉 Have questions about how your home’s layout affects cast iron replacement? Contact In-House Plumbing Company to learn more.

👉 Read the full blog here:
https://inhouseplumbingcompany.com/why-fixture-locations-matter-in-cast-iron-pipe-replacement/

📞 Call 972-494-1750 to schedule your Free Estimate & Consultation.

Serving Plano, Richardson, Garland & Surrounding Cities.

08/31/2026

This home in Grand Prairie, Texas 75050 was one of four Under Slab Cast Iron Pipe Replacement jobs started and completed by In-House Plumbing Company in just one recent week.

If your home’s sewer system is still made of cast iron, now is the time to learn your options. Call 972-494-1750 today to schedule your Free Estimate & Consultation.

Serving Plano, Richardson, Garland & Surrounding Cities.

Learn more here:
https://inhouseplumbingcompany.com/

08/24/2026

Check out our new blog post

Why a Warranty Is Only as Good as the Company Behind It

Many homeowners focus on warranty length when comparing old cast iron pipe replacement proposals. But the truth is simple: a warranty only matters if the company stands behind it.

Some companies advertise unusually long warranties as a sales tactic. But if the company disappears, avoids calls, or finds reasons to deny coverage later, the warranty is meaningless.

Reliable pipe replacement services don’t rely on fine print. They rely on accountability. A cast iron to PVC conversion should be performed by a company that is willing to fix a mistake — even years later — if it turns out they were at fault.

Underground pipe replacement is complex. Soil movement, foundations, and conditions outside a plumber’s control always exist. That’s why honesty matters more than promises.

The real value in cast iron pipe replacement cost isn’t the warranty term — it’s the integrity of the company backing the work. Longevity, reputation, and specialization matter far more than marketing language.

When something goes wrong, the question isn’t “How long is the warranty?”

It’s “Will they answer the phone and take responsibility?”

That’s the warranty that counts.

A warranty only matters if it’s honored. If you want a company that stands behind its work, contact In-House Plumbing Company.

👉 Read the full blog here:
https://inhouseplumbingcompany.com/why-a-warranty-is-only-as-good-as-the-company-behind-it/

📞 Call 972-494-1750 to schedule your Free Estimate & Consultation.

Serving Plano, Richardson, Garland & Surrounding Cities.

08/17/2026

08/10/2026

Check out our new blog post

What Really Matters More Than Reviews When Hiring a Cast Iron Replacement Company

Online reviews are helpful, but they don’t tell the full story — especially for major work like old cast iron pipe replacement under your home.

Some of the most important trust signals go beyond star ratings. Long-term specialization, professional involvement, and accountability matter far more than a snapshot of online feedback. Pipe replacement services that focus exclusively on underground pipe replacement develop experience and systems that general plumbers who “also do cast iron” often lack. A proper cast iron to PVC conversion requires planning, coordination, and repeatable processes built over many years.

Industry and community involvement is another overlooked factor. Membership in professional organizations and local chambers reflects stability and long-term commitment, not short-term marketing. That’s why In-House Plumbing Company is a member of the Plumbing-Heating-Cooling Contractors (PHCC) of North Texas — where our General Manager and one of our three Master Plumbers, Chris Williamson, currently serves on the chapter’s board — as well as the Garland Chamber of Commerce and the Metrocrest Chamber of Commerce.

Longevity matters too. Companies that have been performing cast iron replacement for decades are far more likely to be around if help is ever needed later. That stability directly affects the real value behind a cast iron pipe replacement cost.

Reviews show how a company performed on one job. Trust signals show whether they’re built to stand behind their work long-term.

Reviews are only part of the picture. Contact In-House Plumbing Company to learn what long-term reliability really looks like.

👉 Read the full blog here:
https://inhouseplumbingcompany.com/what-really-matters-more-than-reviews-when-hiring-a-cast-iron-replacement-company/

📞 Call 972-494-1750 to schedule your Free Estimate & Consultation.

Serving Plano, Richardson, Garland & Surrounding Cities.

Address

5903 Curtis Dr.
Allen, TX
75002

Opening Hours

Monday	8am - 5pm
Tuesday	8am - 5pm
Wednesday	8am - 5pm
Thursday	8am - 5pm
Friday	8am - 5pm

Telephone

972-494-1750

Website

http://www.inhouseplumbingcompany.com/

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