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Caleffi 5535 Automatic Filling for Boiler
Central Heating Parts & Accessories

Caleffi 5535 Automatic Filling for Boiler

Ensure absolute stability and longevity in your heating system with the Caleffi 553 automatic filling valve. The world's leading filling valve is here to make sure that the circuit pressure stays...

Ensure absolute stability and longevity in your heating system with the Caleffi 553 automatic filling valve. The world's leading filling valve is here to make sure that the circuit pressure stays exactly where it should be, automatically, silently, and—above all—without damage from limescale.

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Product report

Description

Description

Ensure absolute stability and longevity in your heating system with the Caleffi 553 automatic filling valve. The world's leading filling valve is here to make sure that the circuit pressure stays exactly where it should be, automatically, silently, and—above all—without damage from limescale.

Why the Caleffi 553 is the first choice of professionals:

  • Forget About Scale: Made from advanced non-stick materials, it minimizes scale buildup, the main reason why common fillers "stick." It's an investment that will last for years.
  • Precision Presetting: You can set the desired pressure (e.g. 1.5 bar) on the special scale before you even start filling the system. This way, you know exactly what's happening with no surprises.
  • Complete Network Protection: With an integrated check valve (EN 13959), it guarantees that the heating water will never return to the water supply network, keeping your home's water clean.
  • Clean System: The stainless steel protection filter (mesh) retains impurities, while the manual tap allows you to control the flow at any time.
  • Sensitive Operation: Thanks to the special diaphragm with sealing membrane, the filler detects even the slightest drop in pressure, filling the circuit with maximum accuracy.

Technical Specifications:

  • Adjustment range: 0.2 – 4 bar.
  • Factory setting: 1.5 bar.
  • Maximum inlet pressure: 16 bar.
  • Connection: 1/2" (male union).
  • Materials: Brass body, stainless steel filter, and EPDM membranes.
  • Note: Includes a gauge port (not included in the package).

Manufacturer

Manufacturer Details

Warnings & Safety Information
See full description

Specifications

Specifications

Type
Automatic Filling
Compatibility
for Boiler

Important information

Specifications are collected from official manufacturer websites. Please verify the specifications before proceeding with your final purchase. If you notice any problem you can report it here.

See all specifications

Reviews (25)

Reviews

4.8
25
4.8
Review this product
  1. 23
  2. 4 stars
    0
  3. 3 stars
    0
  4. 2
  5. 1 star
    0
Review this product

Reviews by our members

  • Dimitris_Athanasoglou
    5
    5 out of 6 members found this review helpful
    Dimitris_Athanasoglou

    Verified purchase

    Quality and sturdy construction. You can tell as soon as you open the packaging and hold it in your hands. It should be noted that the rated scale on the pressure adjustment selector is indicative and quite accurate. The actual network pressure and final adjustment of the Caleffi should be done based on the pressure gauge reading. Factory default pressure is set at 1.5 bar. It was adjusted to 1.8 bar (0.3 bar above expansion tank pressure) for a static height of approximately 12 meters.

    Translated from Greek ·
    Did you find this review helpful?
  • px_2507
    5
    4 out of 5 members found this review helpful
    px_2507

    As a professional plumber, for me, you have the ultimate indication with the right components in the installation.

    Translated from Greek ·
    Did you find this review helpful?
  • rinohiberna
    2
    0 out of 11 members found this review helpful
    rinohiberna

    It worked only for 2 weeks. After that, it couldn't reach 1.5 bar. Maybe I got unlucky, but I replaced it with the far one and I calmed down.

    Translated from Greek ·
    Did you find this review helpful?
  • Panagiotis_Ratzas
    5
    1 out of 1 members found this review helpful
    Panagiotis_Ratzas

    I will never deal with radiator ventilation again. A maintenance person told me that I had a problem and I constantly ventilated the radiators, but for the past four years, I have calmed down.

    Translated from Greek ·
    Did you find this review helpful?
  • big_theo
    5
    6 out of 7 members found this review helpful
    big_theo

    Verified purchase

    Compared to the previous model, it is day and night. You hold it in your hands and realize that you will not deal with it again for several years

    Translated from Greek ·
    Did you find this review helpful?
  • 5
    anatoli74

    Verified purchase

    I bought it 15 years ago, it still works. I am getting the same one for another installation.

    Translated from Greek ·
    Did you find this review helpful?
  • 5
    Eleni Mag

    Verified purchase

    Very good payer

    Translated from Greek ·
    Did you find this review helpful?
  • 2
    Adon_Pap

    Verified purchase

    Very good product, the supplier is terrible, my product arrived incomplete

    Translated from Greek ·
    Did you find this review helpful?
  • 5
    0 out of 1 members found this review helpful
    minipk
    Expert user

    Verified purchase

    I haven't used it yet, but as a construction, it seems very good

    Translated from Greek ·
    Did you find this review helpful?
  • 5
    tromb1

    excellent

    Translated from Greek ·
    Did you find this review helpful?
  • 5
    1 out of 1 members found this review helpful
    v.k.vasileiadis

    Verified purchase

    Perfect simply. The only thing that worked as it should

    Translated from Greek ·
    Did you find this review helpful?
  • 5
    Athanfa

    Verified purchase

  • 5
    Leonidas Moulagiannios

    Verified purchase

  • 5
    'exadactilos'

    Verified purchase

  • 5
    gouzoulisspyros

    Verified purchase

  • 5
    horex

    Verified purchase

  • 5
    KostasChol.

    Verified purchase

  • 5
    vagelis_panag

    Verified purchase

  • 5
    kostas_skalts

    Verified purchase

  • 5
    TechTrends

    Verified purchase

  • 5
    arisxantz

    Verified purchase

  • 5
    felekas6

    Verified purchase

  • 5
    karthan1958

    Verified purchase

  • 5
    L__Miltos

    Verified purchase

  • 5
    Giorgos_Bo

    Verified purchase

  • Dimitris_Athanasoglou
    5
    Dimitris_Athanasoglou

    Quality and sturdy construction. You can tell as soon as you open the packaging and hold it in your hands. It should be noted that the rated scale on the pressure adjustment selector is indicative and quite accurate. The actual network pressure and final adjustment of the Caleffi should be done based on the pressure gauge reading. Factory default pressure is set at 1.5 bar. It was adjusted to 1.8 bar (0.3 bar above expansion tank pressure) for a static height of approximately 12 meters.

    Translated from Greek ·
    5
  • px_2507
    5
    px_2507

    As a professional plumber, for me, you have the ultimate indication with the right components in the installation.

    Translated from Greek ·
    4
  • rinohiberna
    2
    rinohiberna

    It worked only for 2 weeks. After that, it couldn't reach 1.5 bar. Maybe I got unlucky, but I replaced it with the far one and I calmed down.

    Translated from Greek ·
    0
  • Panagiotis_Ratzas
    5
    Panagiotis_Ratzas

    I will never deal with radiator ventilation again. A maintenance person told me that I had a problem and I constantly ventilated the radiators, but for the past four years, I have calmed down.

    Translated from Greek ·
    1
  • big_theo
    5
    big_theo

    Compared to the previous model, it is day and night. You hold it in your hands and realize that you will not deal with it again for several years

    Translated from Greek ·
    6
  • See all

Description & Specifications

Ensure absolute stability and longevity in your heating system with the Caleffi 553 automatic filling valve. The world's leading filling valve is here to make sure that the circuit pressure stays exactly where it should be, automatically, silently, and—above all—without damage from limescale.

Why the Caleffi 553 is the first choice of professionals:

  • Forget About Scale: Made from advanced non-stick materials, it minimizes scale buildup, the main reason why common fillers "stick." It's an investment that will last for years.
  • Precision Presetting: You can set the desired pressure (e.g. 1.5 bar) on the special scale before you even start filling the system. This way, you know exactly what's happening with no surprises.
  • Complete Network Protection: With an integrated check valve (EN 13959), it guarantees that the heating water will never return to the water supply network, keeping your home's water clean.
  • Clean System: The stainless steel protection filter (mesh) retains impurities, while the manual tap allows you to control the flow at any time.
  • Sensitive Operation: Thanks to the special diaphragm with sealing membrane, the filler detects even the slightest drop in pressure, filling the circuit with maximum accuracy.

Technical Specifications:

  • Adjustment range: 0.2 – 4 bar.
  • Factory setting: 1.5 bar.
  • Maximum inlet pressure: 16 bar.
  • Connection: 1/2" (male union).
  • Materials: Brass body, stainless steel filter, and EPDM membranes.
  • Note: Includes a gauge port (not included in the package).

Manufacturer

Manufacturer Details

Warnings & Safety Information
Type
Automatic Filling
Compatibility
for Boiler

Important information

Specifications are collected from official manufacturer websites. Please verify the specifications before proceeding with your final purchase. If you notice any problem you can report it here.

Reviews (25)

4.8
25
4.8
Review this product
  1. 23
  2. 4 stars
    0
  3. 3 stars
    0
  4. 2
  5. 1 star
    0
Review this product

Reviews by our members

  • Dimitris_Athanasoglou
    5
    5 out of 6 members found this review helpful
    Dimitris_Athanasoglou

    Verified purchase

    Quality and sturdy construction. You can tell as soon as you open the packaging and hold it in your hands. It should be noted that the rated scale on the pressure adjustment selector is indicative and quite accurate. The actual network pressure and final adjustment of the Caleffi should be done based on the pressure gauge reading. Factory default pressure is set at 1.5 bar. It was adjusted to 1.8 bar (0.3 bar above expansion tank pressure) for a static height of approximately 12 meters.

    Translated from Greek ·
    Did you find this review helpful?
  • px_2507
    5
    4 out of 5 members found this review helpful
    px_2507

    As a professional plumber, for me, you have the ultimate indication with the right components in the installation.

    Translated from Greek ·
    Did you find this review helpful?
  • rinohiberna
    2
    0 out of 11 members found this review helpful
    rinohiberna

    It worked only for 2 weeks. After that, it couldn't reach 1.5 bar. Maybe I got unlucky, but I replaced it with the far one and I calmed down.

    Translated from Greek ·
    Did you find this review helpful?
  • Panagiotis_Ratzas
    5
    1 out of 1 members found this review helpful
    Panagiotis_Ratzas

    I will never deal with radiator ventilation again. A maintenance person told me that I had a problem and I constantly ventilated the radiators, but for the past four years, I have calmed down.

    Translated from Greek ·
    Did you find this review helpful?
  • big_theo
    5
    6 out of 7 members found this review helpful
    big_theo

    Verified purchase

    Compared to the previous model, it is day and night. You hold it in your hands and realize that you will not deal with it again for several years

    Translated from Greek ·
    Did you find this review helpful?
  • 5
    anatoli74

    Verified purchase

    I bought it 15 years ago, it still works. I am getting the same one for another installation.

    Translated from Greek ·
    Did you find this review helpful?
  • 5
    Eleni Mag

    Verified purchase

    Very good payer

    Translated from Greek ·
    Did you find this review helpful?
  • 2
    Adon_Pap

    Verified purchase

    Very good product, the supplier is terrible, my product arrived incomplete

    Translated from Greek ·
    Did you find this review helpful?
  • 5
    0 out of 1 members found this review helpful
    minipk
    Expert user

    Verified purchase

    I haven't used it yet, but as a construction, it seems very good

    Translated from Greek ·
    Did you find this review helpful?
  • 5
    tromb1

    excellent

    Translated from Greek ·
    Did you find this review helpful?
  • 5
    1 out of 1 members found this review helpful
    v.k.vasileiadis

    Verified purchase

    Perfect simply. The only thing that worked as it should

    Translated from Greek ·
    Did you find this review helpful?
  • 5
    Athanfa

    Verified purchase

  • 5
    Leonidas Moulagiannios

    Verified purchase

  • 5
    'exadactilos'

    Verified purchase

  • 5
    gouzoulisspyros

    Verified purchase

  • 5
    horex

    Verified purchase

  • 5
    KostasChol.

    Verified purchase

  • 5
    vagelis_panag

    Verified purchase

  • 5
    kostas_skalts

    Verified purchase

  • 5
    TechTrends

    Verified purchase

  • 5
    arisxantz

    Verified purchase

  • 5
    felekas6

    Verified purchase

  • 5
    karthan1958

    Verified purchase

  • 5
    L__Miltos

    Verified purchase

  • 5
    Giorgos_Bo

    Verified purchase

  • Dimitris_Athanasoglou
    5
    Dimitris_Athanasoglou

    Quality and sturdy construction. You can tell as soon as you open the packaging and hold it in your hands. It should be noted that the rated scale on the pressure adjustment selector is indicative and quite accurate. The actual network pressure and final adjustment of the Caleffi should be done based on the pressure gauge reading. Factory default pressure is set at 1.5 bar. It was adjusted to 1.8 bar (0.3 bar above expansion tank pressure) for a static height of approximately 12 meters.

    Translated from Greek ·
    5
  • px_2507
    5
    px_2507

    As a professional plumber, for me, you have the ultimate indication with the right components in the installation.

    Translated from Greek ·
    4
  • rinohiberna
    2
    rinohiberna

    It worked only for 2 weeks. After that, it couldn't reach 1.5 bar. Maybe I got unlucky, but I replaced it with the far one and I calmed down.

    Translated from Greek ·
    0
  • Panagiotis_Ratzas
    5
    Panagiotis_Ratzas

    I will never deal with radiator ventilation again. A maintenance person told me that I had a problem and I constantly ventilated the radiators, but for the past four years, I have calmed down.

    Translated from Greek ·
    1
  • big_theo
    5
    big_theo

    Compared to the previous model, it is day and night. You hold it in your hands and realize that you will not deal with it again for several years

    Translated from Greek ·
    6
  • See all
55,50 €
14,00 €   shipping cost