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Parts for Optima
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![Pressure Switch Line, ASME 18K (ver. 2) [D.4 L.380, copper pipe]](https://steamericas.com/wp-content/smush-webp/2018/03/steamericas-image_coming_soon-300x300.png.webp "steamericas-image_coming_soon")
Pressure Switch Line, ASME 18K (ver. 2) [D.4 L.380, copper pipe]
Online Price: $33.0882-29740 -
Pressure Switch Line, ASME 27K (ver. 2) [D.4 L.285, copper pipe]
Online Price: $32.0882-29739 -
Pressure Switch Line, ASME 42K (ver. 2) [D.4 L.245, copper pipe]
Online Price: $31.7182-29738 -
Pressure Switch Line, CMF [D.4 L.660, copper pipe]
Online Price: $35.9482-29717 -
![Pressure Switch Line, DM/EST [D.4 L.210, copper pipe]](https://steamericas.com/wp-content/smush-webp/2026/03/00-71681-300x300.jpg.webp "00-71681")
Pressure Switch Line, DM/EST [D.4 L.210, copper pipe]
Online Price: $13.1700-71681 -
![Pressure Switch Line, DM/EST [D.4 L.265, copper pipe]](https://steamericas.com/wp-content/smush-webp/2026/03/82-29754-300x300.jpg.webp "82-29754")
Pressure Switch Line, DM/EST [D.4 L.265, copper pipe]
Online Price: $27.6882-29754 -
![Pressure Switch Line, DMF (ver. 3) [D.4 L.200, copper pipe]](https://steamericas.com/wp-content/smush-webp/2026/03/82-29751-300x296.png.webp "82-29751")
Pressure Switch Line, DMF (ver. 3) [D.4 L.200, copper pipe]
Online Price: $27.0282-29751 -
![Pressure Switch Line, DS (ver. 2) [D.4 L.130, copper pipe]](https://steamericas.com/wp-content/smush-webp/2026/03/82-29750-300x300.jpg.webp "82-29750")
Pressure Switch Line, DS (ver. 2) [D.4 L.130, copper pipe]
Online Price: $26.4482-29750 -
Pressure Switch Line, EST 27K (ver. 3) [D.4 L.223, copper pipe]
Online Price: $27.2282-29753 -
Pressure Switch Line, EST 5/12/18K (ver. 3) [D.4 L.260, copper pipe]
Online Price: $27.6082-29752 -
![Pressure Switch Line, EST 5/12/18K [D.4 L.250, copper pipe]](https://steamericas.com/wp-content/smush-webp/2026/03/82-29755-300x300.jpg.webp "82-29755")
Pressure Switch Line, EST 5/12/18K [D.4 L.250, copper pipe]
Online Price: $27.6082-29755 -
![Pressure Switch Line, EST 5/12/18K [D.4 L.505, copper pipe]](https://steamericas.com/wp-content/smush-webp/2026/03/82-29756-300x208.jpg.webp "82-29756")
Pressure Switch Line, EST 5/12/18K [D.4 L.505, copper pipe]
Online Price: $30.0582-29756 -
![Pressure Switch Line, EST(S)/ESS 12/18K [D.4 L.169, copper pipe]](https://steamericas.com/wp-content/smush-webp/2026/03/00-71700-300x300.jpg.webp "00-71700")
Pressure Switch Line, EST(S)/ESS 12/18K [D.4 L.169, copper pipe]
Online Price: $12.8800-71700 -
![Pressure Switch Line, EST(S)/ESS 27K (ver. 2) [D.4 L.213, copper pipe]](https://steamericas.com/wp-content/smush-webp/2026/03/00-71701-300x300.jpg.webp "00-71701")
Pressure Switch Line, EST(S)/ESS 27K (ver. 2) [D.4 L.213, copper pipe]
Online Price: $13.1700-71701 -
![Pressure Switch Line, EST(S)/ESS 27K [D.4 L.325, copper pipe]](https://steamericas.com/wp-content/smush-webp/2026/03/00-70835-300x300.jpg.webp "00-70835")
Pressure Switch Line, EST(S)/ESS 27K [D.4 L.325, copper pipe]
Online Price: $11.1400-70835 -
Pressure Switch Line, SEII 18K (ver. 2) [D.4 L.400, copper pipe]
Online Price: $33.2882-29736
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