I have a home built in 1996 which utilizes Savard toilet supply lines with a plastic connecting nut and a flexible stainless steel supply hose. Last evening (luckily I was home) the plastic nut sheared in two and separated from the toilet bowl spraying water at a high velocity in the bathroom. Fortunately I was able to stop the flow within a couple of minutes resulting in minimal damage but it highlighted the risk to me of this situation. I subsequently removed the hose and examined the plastic nut which had sheared apart. Further investigation on the internet has highlighted that certain of these supply lines were manufactured with defective plastic nuts that over time could fail causing catastrophic water damage. It appears that it is the original supply line. The question I have for others is what type and brand of supply lines would be the highest quality in order to prevent a repeat of this situation. I would assume that stainless steel or brass fasteners would be highly preferable but it appears the vast majority of the toilet supply lines sold have plastic connection nuts. If so how often should one be replacing these lines to reduce the risk. I am also looking at installing a Water Cop system to further mitigate risk and I would welcome any thoughts from others on the toilet supply lines and Water Cop system. Thanks in advance.

if you are worried, replace with a chrome plated supply tube and brass fastening nut.

Your supply line is not the correct brand or age for most of the failures. I have been using supply lines with plasltic nuts for decades and have had so few failures that I cannot remember when the last one was.The only time I replace them is when I replace the toilet fill valve.

The stainless flex supply lines I use have a metal nut. I can only get them at a local plumbing supply store. The supply lines that the local home improvement stores sell all have the plastic nut.

The stainless braid covered flex vinyl tube supply lines I use have a metal nut. I can only get them at a local plumbing supply store. The supply lines that the local home improvement stores sell all have the plastic nut.

Let's call stuff what it actually is and not fall prey to the manufacturer's carefully worded implications.

Vinyl tube is flexible.

Annealed (soft temper) copper tube is flexible. (speedy connector)

Pick one based on form and function, not on 'ease of installation, or advertising.

If the OP's work had been done 'good practice' he would not have had a problem with junk plastic nuts splitting (lucky he was home).


ps. the cheap plastic nut on the 'big box store' supply is to help prevent stripping of the cheap plastic shank on the cheap 'universal' fill valve'

one would want a Pro-45B model with a brass shank to avoid any 'exposed' plastic parts

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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638



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