See more on this at Plumb2u.
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Stocking a van for toilet and cistern repairs means making a constant judgement call between carrying a handful of universal parts that fit almost anything, and carrying brand-specific parts for the jobs where nothing else will do. Getting that balance wrong either means a van weighed down with slow-moving stock or a plumber turning up without the one part a job actually needs.
See more on this at boiler spares supplier.
Top-fix hinges solve exactly that access problem by using a bolt and a quick-release or turn-to-tighten fixing that can be adjusted entirely from above the pan, with no need to get underneath at all. This has made top-fix the standard choice on most new soft-close seats sold in the last several years, and it is usually the easier option to specify when the underside of the pan is difficult to reach or when the original fixing has seized.
Bottom-fix hinges are the traditional arrangement, with a bolt passing down through the pan from above and a nut and washer tightened from underneath the rim. This means access is needed both above and below the pan to fit or remove the seat, which is straightforward on a floor-standing toilet but considerably more awkward on a wall-hung pan where the underside is harder to reach, or where a previous fitting has corroded the nut solid against the porcelain.
Noise is a real factor when deciding between the two. A side-entry valve introducing water above the surface tends to produce more splash and a higher-pitched fill sound, which shows up as a complaint on quieter properties such as flats with shared walls. Bottom-entry valves that fill below the surface are noticeably quieter, and swapping a noisy side-entry unit for Plumb2u a bottom-entry equivalent is a common upgrade even where nothing has technically failed.
The flush valve tells a different story. If water is draining slowly from the cistern into the pan even when nobody has touched the button or handle, the flush valve seal or siphon washer has likely perished and is no longer sealing the outlet at the base of the tank. This shows up as a cistern that refills every few minutes with no obvious trigger, sometimes described by customers as topping itself up rather than running continuously. On older gravity-fed systems built around a siphon rather than a valve, a split diaphragm inside the siphon body produces the same symptom.
See more on this at boiler spares supplier.
Top-fix hinges solve exactly that access problem by using a bolt and a quick-release or turn-to-tighten fixing that can be adjusted entirely from above the pan, with no need to get underneath at all. This has made top-fix the standard choice on most new soft-close seats sold in the last several years, and it is usually the easier option to specify when the underside of the pan is difficult to reach or when the original fixing has seized.
Bottom-fix hinges are the traditional arrangement, with a bolt passing down through the pan from above and a nut and washer tightened from underneath the rim. This means access is needed both above and below the pan to fit or remove the seat, which is straightforward on a floor-standing toilet but considerably more awkward on a wall-hung pan where the underside is harder to reach, or where a previous fitting has corroded the nut solid against the porcelain.
Noise is a real factor when deciding between the two. A side-entry valve introducing water above the surface tends to produce more splash and a higher-pitched fill sound, which shows up as a complaint on quieter properties such as flats with shared walls. Bottom-entry valves that fill below the surface are noticeably quieter, and swapping a noisy side-entry unit for Plumb2u a bottom-entry equivalent is a common upgrade even where nothing has technically failed.
The flush valve tells a different story. If water is draining slowly from the cistern into the pan even when nobody has touched the button or handle, the flush valve seal or siphon washer has likely perished and is no longer sealing the outlet at the base of the tank. This shows up as a cistern that refills every few minutes with no obvious trigger, sometimes described by customers as topping itself up rather than running continuously. On older gravity-fed systems built around a siphon rather than a valve, a split diaphragm inside the siphon body produces the same symptom.
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