The fastest way to find, compare and buy pilot operated ball float valves.
Describe the tank size, connection type, or water level control task you have. ChatMRO finds the exact match, shows alternatives, and gives you a quote — in seconds. No part number needed.
Updated
AI-generated imageA pilot operated ball float valve is a hydraulically actuated main valve whose opening and closing is governed by a small pilot control float — either a floating ball or a float rod assembly — mounted on the storage tank, reservoir, or basin it controls. As the water level drops, the pilot float drops with it, relieving pilot pressure and allowing the diaphragm-operated main valve to open and refill the tank; as the level rises to the preset point, the pilot float rises, restores back pressure, and closes the main valve tightly. It is the same pilot-and-main-valve architecture found in a pilot operated pressure relief valve, except the pilot senses tank level instead of line pressure.
Municipal water utilities, industrial plant engineers, and facilities managers rely on pilot operated float valves wherever a large storage tank, reservoir, or basin needs automatic, hydraulically-driven level control without electrical power — ground storage tanks, elevated tanks, filtration basins, and cooling tower makeup lines are common applications. Their ability to remotely mount the pilot float away from the main valve body, combined with water-hammer-free delayed-action closing, makes them the standard solution for level control on larger pipeline sizes where a simple mechanical float-and-lever valve would be impractical.
Common configuration: sizes from 1-1/4" up to 36" (or DN32 to DN1400 in metric equivalents), globe or angle body patterns, threaded or flanged end connections, and body materials in bronze, cast/ductile iron (often epoxy coated), or 304/316 stainless steel. Pressure ratings commonly span low-pressure water storage service up to roughly 16 bar (232 psi) depending on model and material, with modulating and non-modulating (full on/off) control options available.
Stop second-guessing. Match your use case below — then let ChatMRO's AI surface the exact model, size, and alternatives in one natural-language search.
Ground or elevated storage tanks where the pilot float can mount directly on the tank. 1-1/4"–6" sizes dominate here.
Larger ground storage tanks, reservoirs, and basins needing high-capacity level control. 8"–36" sizes dominate here.
Applications requiring stainless steel wetted parts for corrosion resistance or water purity.
Pilot operated ball float valves are supplied by control valve specialists such as Cla-Val, Flomatic, and Val-Technik, spanning small direct-mount tank valves to large municipal reservoir control valves. Here's how to navigate the class without a 40-tab browser session.
ChatMRO indexes pilot operated float valve inventory across manufacturers. Search any product by description, application, or rough spec.
The tank-filling workhorse. 1/2"–16" globe or angle pattern, threaded or flanged, bronze or ductile iron construction. Direct-mounted float pilot with stainless steel or plastic float ball, adjustable float rod length.
Search 124-01/124-02 Style Series →1-1/4"–36" (32mm–900mm) sizes for ground storage tanks, reservoirs, and basins. Opens fully at a preset low level and closes tightly at a preset high level, with adjustable setpoints. DO NOT USE FOR ON-OFF THROTTLING SERVICE on modulating variants.
Search C701/C705 Style Series →DN50–DN1400 range, 304/316 stainless steel, bronze, or ductile iron body options, pressure range up to roughly 16 bar. Remote pilot float mounting via command tube for installations where the pilot cannot be direct-mounted on the main valve.
Search Remote & Stainless Steel Series →Use this table as a decision shortcut. Ask ChatMRO for the exact part once you know which row fits your spec.
| Class | Size Range | Body Material | Best For | Max Pressure | Mounting | ChatMRO Verdict |
|---|---|---|---|---|---|---|
| Small Direct-Mount (124-01 style) | 1/2"–6" | Bronze, ductile iron | Small-medium tanks, direct pilot mounting | Model-specific, up to ~250 psi | Direct-mounted on tank/piping | Best entry point for smaller tanks with accessible mounting |
| Standard Municipal (C701/CF701 style) | 1-1/4"–36" | Ductile iron epoxy coated, bronze, stainless | Ground storage tanks, reservoirs, basins | Up to ~232 psi (16 bar) | Direct or remote | Most common choice for municipal-scale tank level control |
| Non-Modulating Reduced Port (C705/CF705 style) | 1-1/4"–36" | Ductile iron, bronze, stainless | Full on/off level control, not throttling | Up to ~232 psi (16 bar) | Direct or remote | Use when simple full open/full close control is sufficient |
| Large Flanged (DN500–DN1400) | 20"–56" (DN500–DN1400) | Ductile iron, stainless | Very large reservoirs and industrial basins | Model-specific | Remote via command tube | Go-to for the largest municipal and industrial tank installations |
| Stainless Steel Corrosion-Resistant | 1/2"–36" | 304/316 stainless steel | Corrosive water chemistry, high-purity process water | Up to ~232 psi (16 bar) | Direct or remote | Best when corrosion resistance beyond bronze/iron is required |
| Generic Import Float Valve | Variable | Cast iron/plastic | Budget, small-scale non-critical use | Lower rated | Direct-mounted | Verify pressure rating and material certification before municipal/industrial use |
Not sure which row is yours? Describe your application to ChatMRO and get an instant AI-matched recommendation with datasheets.
Traditional catalogues force you to know the exact MPN before you find anything. ChatMRO flips that: describe what you need in plain English, and the AI finds the right float valve from 30M+ indexed parts.
In plain language — by tank size, connection type, or level control need. No MPN required.
Natural language processing maps your description to the closest-fit products across brands and specs.
Cross-brand equivalents, lower-cost substitutes, and in-stock alternatives shown side-by-side.
Add to cart or request RFQ directly from the results. No phone calls. No email chains.
Try these pilot operated float valve search examples
Whether you're a municipal engineer specifying level control for a new storage tank, or a facilities manager replacing a failed float valve — use this framework before you procure.
Larger tanks with high fill-rate requirements need larger valve sizes to refill within an acceptable time window — match valve size to your incoming supply line size and desired refill flow rate.
Direct-mount pilots attach straight to the main valve body and suit accessible tank walls; remote pilot configurations connect via a command tube, useful when the main valve must be located away from the tank itself.
Modulating float valves throttle to maintain a level; non-modulating valves are full on/off and should not be used for throttling service — confirm which behavior your application actually requires.
Bronze and epoxy-coated ductile iron suit standard water storage service; 304/316 stainless steel is preferred for corrosive water chemistry or high-purity process water applications — the same reasoning behind stainless bodies on pressure reducing valves.
Confirm the valve's maximum operating pressure meets your system's supply pressure, and that threaded or flanged end connections match your existing piping and flange class (ANSI, PN10/16/25).
Valve sizing should be based on the required fill rate and available supply pressure, not just an assumption based on tank volume. Search by function on ChatMRO — the AI surfaces exact matches AND available substitutes sized to your actual flow requirements.
Non-modulating float valves are designed for full on/off operation only — attempting to use one for continuous throttling can cause premature wear or unstable control. Confirm modulating capability is included if your application requires it.
If the main valve location doesn't allow a directly mounted pilot float, confirm the model supports remote pilot mounting via command tube before ordering.
Describing your application to ChatMRO takes 30 seconds. The AI reads pilot operated float valve spec sheets across brands so you don't have to.
Just describe what you need. ChatMRO finds the right pilot operated ball float valve in seconds.
Pilot operated ball float valves are among the most widely specified automatic level control components for water storage tanks, reservoirs, and basins across municipal and industrial applications. Manufacturers such as Cla-Val, Flomatic, and Val-Technik command significant market presence due to their broad size ranges from 1-1/4" up to 36" (DN32 to DN1400), proven globe and angle body designs, and material options spanning bronze, ductile iron, and 304/316 stainless steel. Procurement professionals and municipal engineers in India, Southeast Asia, and North America regularly source pilot operated float valves for ground storage tank filling, elevated tank level control, and industrial reservoir/basin management.
ChatMRO simplifies this procurement process by providing AI-powered natural language search across a catalogue of 30 million+ indexed industrial parts. Engineers and buyers no longer need to memorize model codes or navigate multi-level filter trees to find the right float valve. A simple description of the tank size, connection type, or level control task is sufficient to surface the correct product alongside cross-brand alternatives and real-time pricing.
