A Geberit Type 380 fill valve for the manufacturer’s surface-mounted tank number 240.700, side entry at 3/8 in, with the fill height set by turning a spindle, in noise group I to DIN 4109.
Specific is the point
Almost every other valve in this hub says “universal”. This one names one tank.
That is either a problem or the entire reason to buy it. Lift your tank lid and read the number molded into the plastic. If it says 240.700, this is the part designed for it and nothing else needs to be checked.
The spindle adjustment
Fill height set by turning a spindle rather than sliding a clip. It is repeatable: you can go back and change it by a known amount, which matters when a tank is filling a centimeter too high and dribbling into the overflow.
Noise group I
The quiet classification to DIN 4109, same as the best universal valve in this hub. On a surface tank in a family bathroom that is a comfort rather than a necessity.
What you are really paying for
Certainty now, and availability in ten years. Genuine parts for this manufacturer’s tanks stay orderable long after generic equivalents have been discontinued.
Availability
Available at around $34.89 on Amazon.com when we checked on October 29, 2026, for delivery to a US address.
Stock and prices on Amazon.com move without notice; the button above opens the live listing.
Prices quoted in this text were read on October 29, 2026. The live price is at the top of the page.
Strengths, and the catches
Strengths
The manufacturer's own part for a named tank, so fit is a certainty rather than a hope
States 3/8 in side entry and noise group I to DIN 4109
Fill height adjusted by turning a spindle, which is a repeatable setting rather than a slide-and-hope
Compromises
Specified for one named tank — outside that, this is the wrong valve
The only fill valve on this shelf, and $34.89 for a part that fits one family of Geberit tanks
No fill rate published, unlike the universal valve beside it here
Specifications
Valve type
Geberit fill valve Type 380 — stated
Tank opening diameter
Not stated as a figure — the valve is specified for Geberit surface tank no. 240.700
Adjustable height range
Fill height adjustable by turning the spindle — stated; no range is given
Inlet connection
3/8 in — stated
Inlet position
Side entry, for surface-mounted tanks — stated
Stated flush volumes
Not stated by the maker
Amazon reference
B0016KZD7S
EAN
0402153427015
The questions we get
How do I find my tank number?
It is usually molded into the plastic inside the tank lid or on the body. Lift the lid and look before ordering — this valve is specified for 240.700, and "it looks similar" is not the same statement.
Is a genuine part worth the premium?
On an in-wall tank, unquestionably — the panel comes off once. On a surface tank it is a smaller argument, and a universal valve at half the price will usually do. What you are buying is the certainty and the availability of the part in ten years.
Against the closest bathroom fittings on price
Same category, nearby prices, between bathroom fittings. What remains is the specifications every one publishes — half empty, a column is no use.
Model
Price
Valve type
Tank opening diameter
Adjustable height range
Inlet connection
Geberit Type 380 fill valve for tank 240.700
$35
Geberit fill valve Type 380 — stated
Not stated as a figure — the valve is specified for Geberit surface tank no. 240.700
Fill height adjustable by turning the spindle — stated; no range is given
A DUAL FLUSH valve, sold as an exact replacement, 3 in, with full and half flush adjustable to match the factory settings. Named for Glacier Bay, AquaSource, Project Source and other dual flush toilets, and 2-PIECE ONLY — the maker states it is not compatible with 1-piece toilets.
3 in.
NOT PUBLISHED, and NO CLEARANCE FIGURE either, where the 3 in Fluidmaster kit on this shelf gives 10 in.
NONE — it replaces the outlet valve. Installation is stated as easy, and whether the tank must come off is NOT STATED either way.
A REPAIR KIT FOR A FLUSHOMETER, not a tank valve at all: an A-38-A diaphragm, a handle repair kit, a V-551-A vacuum breaker kit and a tailpiece O-ring, for Sloan Regal 3.5 GPF manual water closet flushometers. COMMERCIAL, and NOT for a domestic tank toilet.
NOT APPLICABLE — a flushometer has no tank. The compatibility reference is clamshell number 33170011, and the maker states that 3317003 and 33170011 are the same item.
NOT APPLICABLE.
NOT PUBLISHED as a thread. The kit replaces worn or end-of-service-life assemblies, and no tools are stated.
A DUAL FLUSH CONVERSION: it replaces the flapper, the chain and the handle together with two buttons, on a Perma fit silicone seal stated chemical resistant and stated not to warp, in durable plastic with a chrome handle. It will NOT FIT MANSFIELD TOILETS. The maker claims up to 70% less water on the reduced flush, more than 15,000 gallons a year for a family of four, and states that the reduced flush is the one needed four times out of five.
2 in — where the Fluidmaster dual flush on this shelf is 3 in, which is the one figure that decides between them.
NOT PUBLISHED. What the listing gives instead is a CLEARANCE: 10 in minimum from the top of the flush valve opening to the inside of the tank lid.
NONE — it sits on the outlet. Installation is drop-in, no tools, under 20 minutes, with no tank removal.
Where the models diverge, in bathroom fittings
If price decides: Danco HydroRight dual flush converter, at $26.
The price on Amazon.com
This model is listed on Amazon.com, at ≈ $35 at the last reading. Listed is not the same as in stock: availability changes daily, and the buy box shows the live price.
Details checked on October 29, 2026.
Who buys this one, among bathroom fittings
A Geberit surface tank number 240.700, where a genuine part is worth paying for.
Sources
Specifications: the manufacturer sheet for bathroom fittings and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
HydroRight water-saving dual flush valve with push-button handle in plastic and chrome, converting most standard toilets into a dual-flush toilet using up to 70% less water for liquids and paper, and replacing a worn flapper, chain and handle in one part; fitting 1.6 to 3.5+ gallon per flush standard 2-piece toilets with a 2 in flush valve and requiring a 10 inch minimum clearance from the highest point of the flush valve opening to the inside of the tank lid, and stated not to fit Mansfield toilets; drop-in installation without tools in under 20 minutes with no tank removal; a chemical-resistant Perma fit silicone seal stated not to warp; the maker states a family of four saves more than 15,000 gallons a year and that the reduced flush is the setting needed four times out of five
A dual-flush conversion valve with a two-button handle, fitting 2 in valve two-piece toilets without tools.
Best for: An older 1.6 to 3.5 GPF toilet with a 2 in valve, where halving the water is worth twenty minutes
Universal PerforMAX 2 in toilet flush valve repair kit with a peel-and-stick design eliminating glue and requiring no tank removal, including the PerforMAX adjustable water-saving flapper whose dial controls flush volume; a 2 in flush valve replacement kit suitable from 1.28 gallon high-efficiency designs to older 3.5 gallon per flush toilets, built from corrosion-resistant materials with a 5 year warranty per the maker description; the listing states a limit of one per order and that returns will not be honoured on this closeout item
A universal 2 in flush valve repair kit with a peel-and-stick seal and an adjustable PerforMAX flapper.
Best for: A leaking two-inch flush valve, measured first — the cheapest complete repair on this shelf
