Skip to content

Free Standard Parts Shipping Over $999* • TIPS Contract Vendor

📦 Order Status

📞 850-565-3492 🛠️ Apply for Trade Pricing

Boilers
- Lochinvar
- Weil-McLain
Pumps
Parts Finder
Components
Industrial Parts
- HVAC
  
  HVAC Parts
  Fans & Ventilation
  HVAC Controls
  Heating Equipment
  Air Conditioning & Refrigeration
  Filters & Air Treatment
  HVAC Pumps
- Plumbing
  
  Pipes, Valves & Fittings
  Plumbing Repair & Maintenance
  Filtration
  Water Heaters
- Safety
  
  Safety Equipment
- Fireye
  
  Fireye
Support
Resources
Calculators
Home

Boilers
- Lochinvar
- Weil-McLain
Pumps
Parts Finder
Components
Industrial Parts
Support
Resources
Calculators
Home

Search

Item added to your cart

View cart

Boilers ▾

Lochinvar Weil-McLain

Pumps ▾

Bell & Gossett Taco Comfort Solutions Grundfos Armstrong Pumps & Circulators

Parts Finder

Components ▾

Expansion Tanks Air & Dirt Separators Hydronic Trim & Valves Circuit Setters Piping & Fittings Regulators & Controls Flush Valves & Plumbing Bundles & Kits Tankless Water Heaters

Industrial Parts ▾

HVAC HVAC Parts Fans & Ventilation HVAC Controls Heating Equipment Air Conditioning & Refrigeration Filters & Air Treatment HVAC Pumps

Plumbing Pipes, Valves & Fittings Plumbing Repair & Maintenance Filtration Water Heaters

Safety Safety Equipment

Fireye Fireye

Support ▾

Track Your Order Order Assistance Contact Us

Resources

Calculators

Home

Contact Us

📞 850-565-3492 🛠️ Apply for Trade Pricing

Home › Linemaster

Collection: Linemaster

Sort by:

241 products

Filter and sort Filter

Filter and sort

Filter

241 products

Sort by:

Remove all

241 products

Linemaster 500-H-1K - Hercules Full Shield 1 K Potentiometer

Linemaster 500-H-1K - Hercules Full Shield 1 K Potentiometer

Vendor:
Linemaster

Regular price $413.10 USD

Regular price Sale price $413.10 USD
Linemaster 500-H-5K - Foot Swtch,Orange,Aluminum,SPDT,Momentary

Linemaster 500-H-5K - Foot Swtch,Orange,Aluminum,SPDT,Momentary

Vendor:
Linemaster

Regular price $425.09 USD

Regular price Sale price $425.09 USD
Linemaster 500-H-5K - Hercules Full Shield 5 K Potentiometer

Linemaster 500-H-5K - Hercules Full Shield 5 K Potentiometer

Vendor:
Linemaster

Regular price $425.09 USD

Regular price Sale price $425.09 USD
Linemaster 500-HO-10K - Hercules O-Shield 10 K Potentiometer

Linemaster 500-HO-10K - Hercules O-Shield 10 K Potentiometer

Vendor:
Linemaster

Regular price $478.50 USD

Regular price Sale price $478.50 USD
Linemaster 500-HO-1K - Hercules O-Shield 1 K Potentiometer, Line

Linemaster 500-HO-1K - Hercules O-Shield 1 K Potentiometer, Line

Vendor:
Linemaster

Regular price $449.07 USD

Regular price Sale price $449.07 USD
Linemaster 500-HO-5K - Hercules O-Shield 1 K Potentiometer, Line

Linemaster 500-HO-5K - Hercules O-Shield 1 K Potentiometer, Line

Vendor:
Linemaster

Regular price $478.50 USD

Regular price Sale price $478.50 USD
Linemaster 500-HOX-1K - Hercules Ox-Shield 1 K Potentiometer

Linemaster 500-HOX-1K - Hercules Ox-Shield 1 K Potentiometer

Vendor:
Linemaster

Regular price $477.41 USD

Regular price Sale price $477.41 USD
Linemaster 500-HOX-5K - Hercules Ox-Shield 5 K Potentiometer

Linemaster 500-HOX-5K - Hercules Ox-Shield 5 K Potentiometer

Vendor:
Linemaster

Regular price $482.86 USD

Regular price Sale price $482.86 USD
Linemaster 511-B2 - Anti-Trip Hercules Full Shield Dpdt

Linemaster 511-B2 - Anti-Trip Hercules Full Shield Dpdt

Vendor:
Linemaster

Regular price $301.92 USD

Regular price Sale price $301.92 USD
Linemaster 511-B2GA - Anti-Trip Hercules O-Shield Gate 2-Sta

Linemaster 511-B2GA - Anti-Trip Hercules O-Shield Gate 2-Sta

Vendor:
Linemaster

Regular price $444.71 USD

Regular price Sale price $444.71 USD
Linemaster 511-B2O - Anti-Trip Hercules O-Shield Dpdt

Linemaster 511-B2O - Anti-Trip Hercules O-Shield Dpdt

Vendor:
Linemaster

Regular price $381.49 USD

Regular price Sale price $381.49 USD
Linemaster 511-B2OA - Anti-Trip Hercules O-Shield 2-Stage, Spd

Linemaster 511-B2OA - Anti-Trip Hercules O-Shield 2-Stage, Spd

Vendor:
Linemaster

Regular price $439.26 USD

Regular price Sale price $439.26 USD
Linemaster 511-B2OAC2 - Anti-Trip Hercules O-Shield 2-Stg Dual E

Linemaster 511-B2OAC2 - Anti-Trip Hercules O-Shield 2-Stg Dual E

Vendor:
Linemaster

Regular price $386.94 USD

Regular price Sale price $386.94 USD
Linemaster 511-B2OX - Anti Trip - Hercules Gated OX Shield

Linemaster 511-B2OX - Anti Trip - Hercules Gated OX Shield

Vendor:
Linemaster

Regular price $389.12 USD

Regular price Sale price $389.12 USD
Linemaster 511-B2OX - Foot Swtch,Orange,Cast Iron,DPDT,Momentary

Linemaster 511-B2OX - Foot Swtch,Orange,Cast Iron,DPDT,Momentary

Vendor:
Linemaster

Regular price $417.46 USD

Regular price Sale price $417.46 USD
Linemaster 511-B2OXA - Anti-Trip Hercules Ox-Shield 2-Stage

Linemaster 511-B2OXA - Anti-Trip Hercules Ox-Shield 2-Stage

Vendor:
Linemaster

Regular price $427.27 USD

Regular price Sale price $427.27 USD

1
2
3
4
5
6
…
16

Need help finding a replacement part?

Fill out the part request form and someone will get back to you shortly.

PART REQUEST FORM

Quick links

Terms of Service
Refund & Cancellation Policy
Privacy Policy
Shipping & LTL Freight Policy
Order Assistance
Gulf Coast Service Area
Government Procurement

Payment methods

© 2026, National Boiler Supply

Choosing a selection results in a full page refresh.
Opens in a new window.