When Space Is the Real Constraint: Topaz Compact and Rojo Compact

Most valve-sizing conversations start with flow rate and supply plumbing. Sometimes the actual constraint is simpler than that — there just isn't room. A narrow tank wall, a cramped utility compartment, a trough with limited clearance above the waterline. Both Topaz and Rojo have a Compact variant built specifically for that problem, and which one fits depends on what your system actually needs beyond the smaller footprint.

Rojo Compact: Low-Flow, Tight Spaces

The Rojo Compact keeps the same low-flow mechanism as standard Rojo — a narrow weighted float that matches the valve body's own width, so it clears narrow tank walls a standard float never could. It mounts above or below the waterline in side, bottom, or top configurations, and services tool-free (unscrew by hand, water shuts off automatically, no need to touch the main supply). Available in 1/2" and 3/4" inlets, including a 3/4" High-Flow option, running $42.99–$44.99. This is the pick when your system was already Rojo-sized — small tank, low demand — and the only issue is physical clearance.

Topaz Compact: High-Flow Performance, Small Footprint

The Topaz Compact solves a different version of the same problem: what if you need Topaz-level flow, but don't have room for a standard Topaz above the waterline? It keeps the pilot-operated diaphragm mechanism the full-size Topaz uses — compact weighted float, high flow, anti-water-hammer slow shutdown, FrostPro compatible — just built into a smaller installation envelope. Configured for above-water mounting only, it's a strong fit for pump-supplied systems in tight compartments. Available in 3/4", 1", and 1.25" inlets with Detach short or long tail, running $96.99–$103.99.

Choosing Between Them

If your system's demand was always Rojo-sized and space is the only issue, Rojo Compact is the straightforward fit. If you need real flow — pump-fed systems, higher-demand tanks — but the install space won't take a standard Topaz, Topaz Compact gets you there without compromising on performance. Neither is a downgrade from its full-size counterpart; they're the same mechanism, sized for where a standard valve simply won't fit.