DISTRIBUTOR-FIRST SUPPLY PARTNER · SINCE 1999 Live · Compressed Air System
A zero-air-loss condensate drain is a powered drain that discharges only liquid condensate and never compressed air. It does the same job as any drain — clearing the water-and-oil mixture from a cool point in the system (aftercooler, receiver tank, refrigerated dryer, or filter sump) — but the valve opens only when liquid is actually present, so no paid-for compressed air escapes with the discharge. It installs at the same one-per-cool-point footprint as a timer drain, between the component's low-point port and a routed discharge to an oil-water separator (OWS, the treatment unit that polishes oily condensate before sewer discharge). Two designs share this lane: an electronic level-controlled drain (a sensor opens the valve on real liquid) and a magnetic-float drain (a mechanical float trips the valve with no electricity at all). Selection between the two is handled on the category page.
Where zero-air-loss earns its premium — and where a timer drain is still the right call. Scroll the strip →
Electronic level sensor or mechanical float — either way the valve fires only when condensate is actually present. Zero compressed air vents per cycle. Across 3-6 drains in a typical plant, that's 2-5% of compressor output the customer stops paying for.
Condensate swings hour-to-hour and season-to-season. A timer is a guess; zero-air-loss reacts to the real chamber level — clears fully under summer load, sits quiet at winter idle. No retune calls.
Industry Leader tier level-sensed drains carry a fault output — wire it to building management or a local annunciator and the customer learns about a failed drain before the dryer floods or the filter saturates. The cost-of-failure case sells itself in critical-process plants.
Electronic level-sensed is the default — alarm output, oil-tolerant capacitive sensor, 24V DC at the install point. Magnetic-float when there's no power available, outdoor/remote, or harsh service where no-electronics-to-fail wins.
At single-compressor under-25-HP scale with steady ambient, the energy math doesn't justify the premium. → Re-spec to electronic timer drain at low-volume sumps; reserve zero-air-loss for dryer, aftercooler, large receiver.
Both electronic and magnetic-float chambers freeze the same as any trap — frozen sensor reads false, frozen float won't rise. → Spec the heated-housing variant, or insulate + heat-trace the chamber and discharge line for sub-freezing service.
Zero air loss doesn't change the oil content — the captured liquid still runs 300+ ppm oil from an oil-injected compressor. Sanitary-sewer discharge untreated is a regulated violation. → Add oil-water separator downstream; manifold all drains into one OWS inlet.
From the machine spec sheet → to the part number. Answer what you know — leave the rest blank — and send.
Most distributors sell one brand per product type. SPC's 60-brand portfolio means every Product Type page surfaces three real options matched to how your customer is buying today. Pick the tier; the quote desk handles the cross-reference.
The zero-air-loss drain is sold against the timer drain on energy math, and against the manual drain on operator labor. Frame the cost per year, not the cost per piece — the customer who runs the math always upgrades.
Each industry below uses this product across the listed areas. Open an industry to see how it fits the rest of its system.
Oil & Gas / Energy → 
Mining & Heavy Equipment → Also applies to Refrigerated dryer outlet · Compressor aftercooler discharge · Large receiver tanks (60+ gallon) · Remote / outdoor / generator-package compressors · magnetic-float is the standard answer · Critical-process plants where drain failure would shut production · Energy-efficiency upgrade projects · High-pressure compressors (above 232 PSI) · NOT typically used in
Every entry is a real product on this site — linked, not just named. Quote them on the same line item.
Stock replacement sensors (electronic) or float assemblies (magnetic) as service kits at the customer's site. The sensor or float is the typical failure point — not the whole drain housing — so a kit on the shelf turns extended downtime into a same-day swap.
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