Most homeowners nod along when a plumber says "we'll use CPVC here and GI there" without actually knowing what that means for cost, durability, or safety, and this article exists to close that gap in plain language. The goal isn't to turn readers into plumbers — it's to give them enough working knowledge that they can ask a good follow-up question and recognize when a quote or material choice doesn't add up. Structure the piece material by material: PVC for cold-water drainage and waste lines, where it's cheap and adequate but shouldn't be used for hot water; CPVC, which handles hot water safely and is now standard for indoor hot and cold supply lines in most new Nepali construction; GI (galvanized iron), still common in older homes and valued for strength but prone to internal rusting and reduced flow over decades; and HDPE, increasingly used for underground and outdoor supply lines because of its flexibility and resistance to ground movement, which matters in a seismically active region. For each, note typical use case, rough lifespan, and a realistic price range per meter or per fitting. Add a section specifically on fittings — elbows, tees, unions, reducers, and the couplers that connect different pipe materials during a renovation when old GI meets new CPVC. Explain why using a poorly matched fitting between two materials is one of the most common causes of slow leaks that show up months later as damp patches or mold, which is a genuinely useful, non-obvious point that makes the article worth ranking. Mention that fitting quality varies as much as pipe quality, and a slightly more expensive genuine fitting is cheaper than a wall repair later. Close with a short, practical buying guide: how to tell genuine branded pipe and fitting packaging from cheaper unmarked stock, why buying pipe and fittings from the same supplier as your plumber's recommendation avoids mismatch disputes, and what to keep on hand for minor emergency repairs between professional visits. This is where National Home Decor's plumbing hardware range fits naturally, positioned as a source for the exact materials described above rather than a generic upsell. Use "pipes" and "fittings" throughout, especially in the material-by-material subheadings, and work "best material available in hardware" into the buying-guide section. Mention "plumbers" once in the context of why professional installation still matters even with good materials, and "construction" once in the intro to widen the article's relevance. Link to the plumber-and electrician hiring guide and the hardware items checklist, and close with a note that stock and pricing can be confirmed in-store. Close with a brief FAQ covering the practical follow-up questions this topic generates: "can Close with a brief FAQ covering the practical follow up questions this topic generates: can PVC and CPVC pipes be joined together safely," "which pipe type is best for outdoor water lines given Nepal's climate," and "how long do GI pipes typically last before they need replacing." These answers are short by nature, which makes them ideal featured-snippet candidates and gives the piece extra long-tail keyword coverage without forcing extra body copy. Structured data (FAQPage schema) around this section is a low-cost addition that can earn a rich result in search, which matters for a technical, comparison-driven topic like pipe materials where searchers are actively looking for a fast, credible answer.
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