Method for connecting, in a fluid manner, a first and a second fluid valve in a first direction X and comprising the following steps: a. providing said first and second fluid valve, o said first fluid valve comprising at least two first ports (11, 12) each having an opening (111, 112) towards the outside; o said second fluid valve comprising at least two second ports (21, 22) each having an opening (221, 222) towards the outside; b. providing a first pipe having a first and a second end: o the first end being suitable for being inserted into an opening (111, 112) of a first port (11, 12) of the first fluid valve; o the second end being suitable for being inserted into an opening (221, 222) of a second port (21, 22) of the second fluid valve; c. inserting the first end of the first pipe into an opening (111, 112) of a first port (11, 12) of the first fluid valve and inserting the second end of the first pipe into an opening (221, 222) of a second port (21, 22) of the second fluid valve, in order to form a fluid assembly; d. providing a first compression means comprising: o two ends (2, 3) being two plates in order to compress said fluid assembly comprising said first and second fluid valve and said first pipe in said first direction X between said two ends (2, 3); o a hollow profile suitable for receiving the first and second fluid valve (10; 20); o fastening means for fastening said two plates to two ends of said hollow profile. e. positioning said two ends (2, 3) being two plates of said first compression means on either side of said fluid assembly in said first direction X; f. applying a compression force, in parallel to said first direction X, onto said fluid assembly via said first compression means in order to compress said first pipe between said first and second fluid valve. a. providing said first and second fluid valve, o said first fluid valve comprising at least two first ports (11, 12) each having an opening (111, 112) towards the outside; o said second fluid valve comprising at least two second ports (21, 22) each having an opening (221, 222) towards the outside; o said first fluid valve comprising at least two first ports (11, 12) each having an opening (111, 112) towards the outside; o said second fluid valve comprising at least two second ports (21, 22) each having an opening (221, 222) towards the outside; b. providing a first pipe having a first and a second end: o the first end being suitable for being inserted into an opening (111, 112) of a first port (11, 12) of the first fluid valve; o the second end being suitable for being inserted into an opening (221, 222) of a second port (21, 22) of the second fluid valve; o the first end being suitable for being inserted into an opening (111, 112) of a first port (11, 12) of the first fluid valve; o the second end being suitable for being inserted into an opening (221, 222) of a second port (21, 22) of the second fluid valve; c. inserting the first end of the first pipe into an opening (111, 112) of a first port (11, 12) of the first fluid valve and inserting the second end of the first pipe into an opening (221, 222) of a second port (21, 22) of the second fluid valve, in order to form a fluid assembly; d. providing a first compression means comprising: o two ends (2, 3) being two plates in order to compress said fluid assembly comprising said first and second fluid valve and said first pipe in said first direction X between said two ends (2, 3); o a hollow profile suitable for receiving the first and second fluid valve (10; 20); o fastening means for fastening said two plates to two ends of said hollow profile. o two ends (2, 3) being two plates in order to compress said fluid assembly comprising said first and second fluid valve and said first pipe in said first direction X between said two ends (2, 3); o a hollow profile suitable for receiving the first and second fluid valve (10; 20); o fastening means for fastening said two plates to two ends of said hollow profile. e. positioning said two ends (2, 3) being two plates of said first compression means on either side of said fluid assembly in said first direction X; f. applying a compression force, in parallel to said first direction X, onto said fluid assembly via said first compression means in order to compress said first pipe between said first and second fluid valve.