Home Lochinvar AQUAS Low NOx Indoor Indirect Pool Heater | Natural Gas 400K BTU | ASME Commercial Grade | APN400 Parts
NOTICE: The pool & spa industry continues to face industry-wide shortages on many products that most vendors expect to last late into 2022. We're allowing items to be purchased so that customers who choose to wait will have their order shipped when product is available. Most vendors are not providing any ETA on when items will be available. WE WILL EMAIL YOU RIGHT AWAY IF YOUR ITEM IS BACKORDERED. 

Lochinvar AQUAS Low NOx Indoor Indirect Pool Heater | Natural Gas 400K BTU | ASME Commercial Grade | APN400 Parts

Back to Product
Lochinvar AQUAS Low NOx Indoor Indirect Pool Heater | Natural Gas 400K BTU | ASME Commercial Grade | APN400 Parts Schematic
1
Lochinvar Heat Exchanger Assembly | 100188998
Lochinvar Heat Exchanger Assembly | 100188998
Quantity:
$6,020.37

2
Lochinvar Heat Exchanger Kit, Gasket Set | 100288908
Lochinvar Heat Exchanger Kit, Gasket Set | 100288908
Quantity:
$141.34

3
Lochinvar Blanket Insulation | 100288897
Lochinvar Blanket Insulation | 100288897
Quantity:
$70.14

4
Lochinvar Heat Exchanger Bolt | 100288875
Lochinvar Heat Exchanger Bolt | 100288875
Quantity:
$15.34

5
Lochinvar Heat Exchanger Nut | 100288876
Lochinvar Heat Exchanger Nut | 100288876
Quantity:
$13.94

6
Lochinvar Heat Exchanger Washer | 100288904
Lochinvar Heat Exchanger Washer | 100288904
Quantity:
$20.26

7
Lochinvar Main Control Board | 100285617
Lochinvar Main Control Board | 100285617
Quantity:
$412.70

7
Lochinvar Canadian Main Control Board | 100285641
Lochinvar Canadian Main Control Board | 100285641
Quantity:
$412.70

7
Lochinvar High Altitude Main Control Board | 100285605
Lochinvar High Altitude Main Control Board | 100285605
Quantity:
$412.70

7
Lochinvar Spa Main Control Board | 100285608
Lochinvar Spa Main Control Board | 100285608
Quantity:
$412.70

7
Lochinvar Spa High Altitude Main Control Board | 100285610
Lochinvar Spa High Altitude Main Control Board | 100285610
Quantity:
$412.70

8
Lochinvar Interface Control Board | 100278134
Lochinvar Interface Control Board | 100278134
Quantity:
$273.99

9
Lochinvar Connection Board | 100277838
Lochinvar Connection Board | 100277838
Quantity:
$105.69

10
Lochinvar Pump Relay Board | 100208493
Lochinvar Pump Relay Board | 100208493
Quantity:
$169.48

11
Lochinvar Pump Relay, 1.5 HP | 100208502
Lochinvar Pump Relay, 1.5 HP | 100208502
Quantity:
$48.43

12
Lochinvar Low Water Cut-Off | 100276822
Lochinvar Low Water Cut-Off | 100276822
Quantity:
$314.10

13
Lochinvar 120 VAC Relay, 60 HZ | 100208509
Lochinvar 120 VAC Relay, 60 HZ | 100208509
Quantity:
$94.88

14
Lochinvar Transformer | 100208246
Lochinvar Transformer | 100208246
Quantity:
$76.46

15
Lochinvar Fluted Knob | 100277824
Lochinvar Fluted Knob | 100277824
Quantity:
$18.13

16
Lochinvar Momentary Switch, Black | 100277798
Lochinvar Momentary Switch, Black | 100277798
Quantity:
$28.62

17
Lochinvar Momentary Switch, Red | 100277797
Lochinvar Momentary Switch, Red | 100277797
Quantity:
$28.62

N/A
Lochinvar Power Switch | 100208242
Lochinvar Power Switch | 100208242
Quantity:
$15.34

18
Lochinvar Low Water Cut-Off Probe | 100309672
Lochinvar Low Water Cut-Off Probe | 100309672
Quantity:
$50.88

N/A
Lochinvar Flue Sensor | 100208561
Lochinvar Flue Sensor | 100208561
Quantity:
$61.72

19
Lochinvar Inlet Sensor | 100208549
Lochinvar Inlet Sensor | 100208549
Quantity:
$34.67

20
Lochinvar Outlet Sensor, High Limit | 100208544
Lochinvar Outlet Sensor, High Limit | 100208544
Quantity:
$35.72

N/A
Lochinvar Thermostat Sensor | 100208552
Lochinvar Thermostat Sensor | 100208552
Quantity:
$22.80

N/A
Lochinvar System Sensor Kit | 100170645
Lochinvar System Sensor Kit | 100170645
Quantity:
$42.94

N/A
Lochinvar Igniter Harness | 100208620
Lochinvar Igniter Harness | 100208620
Quantity:
$31.59

N/A
Lochinvar Flame Sensor Harness | 100278061
Lochinvar Flame Sensor Harness | 100278061
Quantity:
$18.13

N/A
Lochinvar Power Harness | 100288900
Lochinvar Power Harness | 100288900
Quantity:
$107.50

N/A
Lochinvar Unit Harness | 100277748
Lochinvar Unit Harness | 100277748
Quantity:
$165.18

N/A
Lochinvar Ribbon Cable Harness | 100288901
Lochinvar Ribbon Cable Harness | 100288901
Quantity:
$79.22

N/A
Lochinvar Gas Valve Harness | 100288902
Lochinvar Gas Valve Harness | 100288902
Quantity:
$13.97

21
Lochinvar Modbus Kit | 100071757
Lochinvar Modbus Kit | 100071757
Quantity:
$220.97

22
Lochinvar Gas Valve, Natural and Propane | 100189393
Lochinvar Gas Valve, Natural and Propane  | 100189393
Quantity:
$341.49

23
Lochinvar Venturi | 100278070
Lochinvar Venturi | 100278070
Quantity:
$166.90

24
Lochinvar Fan Kit | 100188879
Lochinvar Fan Kit | 100188879
Quantity:
$699.22

25
Lochinvar Air Inlet Kit | 100189214
Lochinvar Air Inlet Kit | 100189214
Quantity:
$91.19

N/A
Lochinvar Propane Conversion Kit | 100189174
Lochinvar Propane Conversion Kit | 100189174
Quantity:
$88.44

26
Lochinvar Gas Valve Union Adapter | 100278091
Lochinvar Gas Valve Union Adapter | 100278091
Quantity:
$50.88

29
Lochinvar Fan Gasket | 100288877
Lochinvar Fan Gasket | 100288877
Quantity:
$16.73

31
Lochinvar Gas Valve Union Gasket | 100288899
Lochinvar Gas Valve Union Gasket | 100288899
Quantity:
$13.97

33
Lochinvar Venturi Gasket | 100208761
Lochinvar Venturi Gasket | 100208761
Quantity:
$9.31

34
Lochinvar Igniter Kit | 100165924
Lochinvar Igniter Kit | 100165924
Quantity:
$81.98

35
Lochinvar Igniter Gasket | 100233662
Lochinvar Igniter Gasket | 100233662
Quantity:
$9.64

36
Lochinvar Flame Sensor Kit | 100165923
Lochinvar Flame Sensor Kit | 100165923
Quantity:
$63.59

37
Lochinvar Flame Sensor Gasket | 100233664
Lochinvar Flame Sensor Gasket | 100233664
Quantity:
$9.64

38
Lochinvar Sight Glass Kit | 100189215
Lochinvar Sight Glass Kit | 100189215
Quantity:
$61.72

39
Lochinvar Sight Glass Gasket | 100275564
Lochinvar Sight Glass Gasket | 100275564
Quantity:
$26.73

40
Lochinvar Burner Kit | 100188648
Lochinvar Burner Kit | 100188648
Quantity:
$815.29

41
Lochinvar Burner Gasket | 100288892
Lochinvar Burner Gasket | 100288892
Quantity:
$107.50

42
Lochinvar Burner Fiberboard | 100288927
Lochinvar Burner Fiberboard | 100288927
Quantity:
$180.72

43
Lochinvar Heat Exchanger Top Plate Insulation | 100288894
Lochinvar Heat Exchanger Top Plate Insulation | 100288894
Quantity:
$21.53

44
Lochinvar Heat Exchanger Top Plate | 100189410
Lochinvar Heat Exchanger Top Plate | 100189410
Quantity:
$676.06

45
Lochinvar Fan Plate | 100189408
Lochinvar Fan Plate | 100189408
Quantity:
$291.22

46
Lochinvar Small AQUAS Hex Plate, M6, MFG | 100300551
Lochinvar Small AQUAS Hex Plate, M6, MFG | 100300551
Quantity:
$397.70

N/A
Lochinvar Condensate Trap Assembly | 100284709
Lochinvar Condensate Trap Assembly | 100284709
Quantity:
$93.96

47
Lochinvar Condensate Hose Kit | 100288163
Lochinvar Condensate Hose Kit | 100288163
Quantity:
$71.07

N/A
Lochinvar Triometer Gauge | 75 PSI | 100208152
Lochinvar Triometer Gauge | 75 PSI | 100208152
Quantity:
$42.98

48
Lochinvar Air Vent Valve | 100167445
Lochinvar Air Vent Valve | 100167445
Quantity:
$19.18

N/A
Lochinvar Relief Valve | 100167399
Lochinvar Relief Valve | 100167399
Quantity:
$175.87

N/A
Lochinvar High Limit Switch, 115 DEG | 100276808
Lochinvar High Limit Switch, 115 DEG | 100276808
Quantity:
$62.65

N/A
Lochinvar Circulating Pump | 100307555
Lochinvar Circulating Pump | 100307555
Quantity:
$549.29

49
Lochinvar Front Outer Jacket Kit | 100285665
Lochinvar Front Outer Jacket Kit | 100285665
Quantity:
$799.20

50
Lochinvar Right Outer Jacket Kit | 100285666
Lochinvar Right Outer Jacket Kit | 100285666
Quantity:
$354.76

51
Lochinvar Left Outer Jacket Kit | 100285667
Lochinvar Left Outer Jacket Kit | 100285667
Quantity:
$348.84

52
Lochinvar Display Bezel Assembly Kit | 100310323
Lochinvar Display Bezel Assembly Kit | 100310323
Quantity:
$342.28

53
Lochinvar Display Bezel | 100278236
Lochinvar Display Bezel | 100278236
Quantity:
$117.52

54
Lochinvar Bezel Prop Rod | 100288909
Lochinvar Bezel Prop Rod | 100288909
Quantity:
$24.81

N/A
Lochinvar Door Catch | 100232751
Lochinvar Door Catch | 100232751
Quantity:
$33.62

N/A
Lochinvar Door Strike | 100208818
Lochinvar Door Strike | 100208818
Quantity:
$13.97

N/A
Lochinvar Spring Hinge | 100288923
Lochinvar Spring Hinge | 100288923
Quantity:
$73.35

HABLAMOS ESPAÑOL
Hay muchas maneras diferentes de contactarnos, y nos gustaría hablar con usted sobre las preguntas de su compra, ayudarle a diagnosticar los problemas de su equipo y escuchar acerca de cómo podemos mejorar y todo lo que está en su mente.
Click Here
OPEN 6 DAYS A WEEK
6am - 6pm Monday thru Saturday
Pacific Standard Time
Will-Call Hours Click Here
NEWSLETTER
Be the first to know the latest news, deals & special events!

Email:


By signing up you indicate that you agree to the terms of our privacy policy.



ABOUT THE STORE
Pool Supply Unlimited is an e-commerce company that loves water. We love to pump it, filter it, heat it, chlorinate it, light it up and stare at it while we're barbequing a fat, juicy steak. There are real pool professionals working here. Our guys have seen thousands of pools in their careers, no exaggeration. We are based in Southern California and can land most products to your door (within the 48 contiguous states) in less than a week.
COMPANY
ABOUT US
BETTER BUSINESS BUREAU
CONTACT US
CONTACTO
CUSTOMER REVIEWS
FAQ
HOURS OF OPERATION
PRIVACY
SITE MAP
TESTIMONIALS
MY ACCOUNT
LOGIN
FORGOT PASSWORD
LOYALTY POINTS
RETURN MERCHANDISE
PROMOTIONS
COUPONS
REBATES
NEWSLETTER
BREAD FINANCING
WARRANTIES
TERMS
INTERNATIONAL ORDERS
LOYALTY POINTS TERMS
RETURNS POLICY
SHIPPING POLICY
RESOURCES
BLOG
PRODUCT MANUALS
Visa Mastercard Discover American Express PayPal