Dry-Fit the New Tub
Part of project
How to Install a New Bathtub and Drain Assembly · Step 3 of 7
This guide provides a comprehensive, step-by-step process for removing an old bathtub and installing a new alcove-style tub and its associated drain assembly. The process covers demolition, subfloor preparation, dry-fitting, drain assembly installation, setting the tub in mortar, and final plumbing connections and testing.
671K subscribers
FAQs
How long should I expect this bathtub installation project to take, especially for someone with intermediate DIY experience?
For an intermediate DIYer, this project can typically take 1-2 full weekends, or 20-40 hours, assuming you have all materials and tools ready. This timeframe includes demolition, subfloor preparation, dry-fitting, plumbing connections, and allowing time for mortar to cure and leak tests. Rushing any step, especially plumbing or leveling, can lead to costly mistakes.
The tool list includes items like a ceiling fan and outdoor dining set. What are the truly essential and correct tools for this bathtub and drain installation?
You'll primarily need demolition tools like a pry bar and utility knife for removal, Channellock pliers and screwdrivers for plumbing work, and a level for setting the tub. Crucially, ignore items like ceiling fans, outdoor dining sets, or decorative candles as they are not relevant to this plumbing project. Consider renting a reciprocating saw for easier tub demolition if your old tub is cast iron.
Why is a mortar bed necessary for setting an alcove bathtub, and can I skip it or use an alternative?
A mortar bed provides crucial support to the tub's base, preventing flexing, cracking, and squeaking over time by evenly distributing weight across the subfloor. It ensures the tub is perfectly level and creates a solid, custom-fit foundation. While some acrylic tubs specify foam adhesive, mortar mix (like Quikrete Mortar Mix) is generally recommended for alcove tubs for maximum stability and longevity.
What are the most common mistakes DIYers make when installing the drain and overflow assembly, and how can I avoid leaks?
A common mistake is not properly sealing all drain connections, especially the rubber gaskets and using insufficient plumber's putty for the drain shoe. Always use a generous bead of plumber's putty around the drain flange and thread sealant (like PTFE plumber's tape) on all threaded connections. Hand-tighten connections firmly, then use Channellock pliers for a final snug turn, being careful not to overtighten plastic components.
Dry-Fit the New Tub
Part of project
How to Install a New Bathtub and Drain Assembly · Step 3 of 7
This guide provides a comprehensive, step-by-step process for removing an old bathtub and installing a new alcove-style tub and its associated drain assembly. The process covers demolition, subfloor preparation, dry-fitting, drain assembly installation, setting the tub in mortar, and final plumbing connections and testing.
Frequently Asked Questions
How long should I expect this bathtub installation project to take, especially for someone with intermediate DIY experience?
For an intermediate DIYer, this project can typically take 1-2 full weekends, or 20-40 hours, assuming you have all materials and tools ready. This timeframe includes demolition, subfloor preparation, dry-fitting, plumbing connections, and allowing time for mortar to cure and leak tests. Rushing any step, especially plumbing or leveling, can lead to costly mistakes.
The tool list includes items like a ceiling fan and outdoor dining set. What are the truly essential and correct tools for this bathtub and drain installation?
You'll primarily need demolition tools like a pry bar and utility knife for removal, Channellock pliers and screwdrivers for plumbing work, and a level for setting the tub. Crucially, ignore items like ceiling fans, outdoor dining sets, or decorative candles as they are not relevant to this plumbing project. Consider renting a reciprocating saw for easier tub demolition if your old tub is cast iron.
Why is a mortar bed necessary for setting an alcove bathtub, and can I skip it or use an alternative?
A mortar bed provides crucial support to the tub's base, preventing flexing, cracking, and squeaking over time by evenly distributing weight across the subfloor. It ensures the tub is perfectly level and creates a solid, custom-fit foundation. While some acrylic tubs specify foam adhesive, mortar mix (like Quikrete Mortar Mix) is generally recommended for alcove tubs for maximum stability and longevity.
What are the most common mistakes DIYers make when installing the drain and overflow assembly, and how can I avoid leaks?
A common mistake is not properly sealing all drain connections, especially the rubber gaskets and using insufficient plumber's putty for the drain shoe. Always use a generous bead of plumber's putty around the drain flange and thread sealant (like PTFE plumber's tape) on all threaded connections. Hand-tighten connections firmly, then use Channellock pliers for a final snug turn, being careful not to overtighten plastic components.