Model # LTA1203S-2

Internet #204785674

Store SO SKU #1000800444

Taco 3/4 in. NPT 120-VAC Probe Low Water Cutoff Auto Reset


3/4 in. NPT 120-VAC Probe Low Water Cutoff Auto Reset

$7208 /each
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Product Overview

The Taco LWCO provides reliable protection for all types of boilers, from small residential hot water boilers to large industrial steam boilers. The boiler’s minimum safe operating water level is specified by each manufacturer. Should the water level dip below that specified level, heat will accumulate quickly causing significant damage to the boiler and a potential external safety hazard. The Taco LWCO prevents this hazard from occurring. The LWCO can be used as a primary or secondary low water cutoff on steam boilers up to 250 psi, a primary limit control on hot water boilers or to protect pumps from running dry in condensate receiver tank applications. The LWCO can also activate alarm systems or automatic water feeders.

  • Patented adjustable probe sensitivity
  • External LEDs and simplified wiring for easy installation and testing
  • Automatic or manual reset mode
  • Standard on-board (NEMA 1) or remote (NEMA 4) probe
  • LT models include external test button, adjustable delay on break (DOB) and delay or make (DOM) features
  • Click here for more information on Electronic Recycling Programs

Info & Guides

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Product Depth (in.)
Product Height (in.)
Product Width (in.)


Annual Fuel Utilization Efficiency (AFUE) (%)
Capacity (gallons)
Color Family
Energy Consumption (kWh/year)
Fuel Gauge
Fuel type
Heat rating (BTU/hour)
Heating Product Type
Heating Technology Type
Ignition Type
No Ignition System
Product Weight (lb.)

Warranty / Certifications

Certifications and Listings
1-UL Listed,cUL Listed
Manufacturer Warranty
Limited Warranty

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Customer Questions & Answers

Do mounting instructions accompany this lwco? Length of probe ? Is an extended length probe ava...

Do mounting instructions accompany this lwco? Length of probe ? Is an extended length probe available? Wiring instructions? Intention is to use this as a secondary low water cutoff. Boiler is a horizontal steam boiler - 20 hp with McDonnel Miller 157 controls for low water and water pump actuation.
Asked by: spotman
First thing I would say is that that your question and the detail given makes me think there is a possibility you are dealing with high pressure steam. In which case please stop immediately and speak to a stationary plant engineer before doing anything. High pressure steam can be exceedingly dangerous and is highly regulated for good reason. Even if this is low pressure steam, you need someone who has the experience to look at the system holistically and make recommendations specific to your system. This product is essentially a 120 Volt switch that is either open or closed depending on the presence of water. I did go to he Taco web site where there is more information, we will add PDF's of it to the Home Depot site. However it does not give you specific information as to where to install it. Due to the fact that every system will be different. This is LWCO is intended for more run of the mill residential low pressure boilers, that would have a dedicated port for the LWCO. The big name in LWCO's and feeders for steam boilers is McDonnell Miller as you mentioned. The other is Hydro Level. From the little you describe I think I think they would be more likely to make the type of product you need.
Answered by: chris
Date published: 2017-04-16
  • y_2017, m_8, d_14, h_2CST
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